I don't know the specifics of your previous solution, but my guess is the way you made the diagonals probably won't work anymore. Regarding making the square block, using the diagonal is correct and using the risers on the right to elevate yourself is also correct.
If there’s anything further you are willing to say or correct my thinking in regards to making the square block, feel free:
The first block, the block that will hit the upper left button cannot be pushed directly to the button. It has to travel left, one space above the button, and then loop back (requires a down block) in order to synchronize with the object that will hit the lower button. In order to affect the split motion of the 2 blocks, the first block needs to be on another blockdirectly left of the diagonal block. It isn’t possible to get that first block in place without pushing one of the down blocks off of the platform in order to transfer it. Atleast one more down blocks are necessary for block #2 to reach the bottom button. Down ward blocks are necessary to create down right blocks. Two down right blocks are needed to reach the exit and need to be transferred to it ( the exit) by way of being stacked on other blocks. It’s not possible to elevate any blocks in the level after the risers have been used once.
Obviously these can’t all be true and my common sense tells me there must be a way to keep two downward blocks up on the platform while making the square block I’m just spelling out the thought process. Tough puzzle. I believe the only two other I know that started it both already gave up.
The timing for this part is tricky, hopefully this explanation helps (also, just to confirm, you won't need to drop more than two downward blocks to the ground and you won't ever need to raise blocks off of the ground again after you get onto the platform with the blocks). The paths to each button from the diagonal don't need the same number of pieces, as you can essentially speed up a path by having another stationary block sitting along it. As an example, suppose a block is sitting two spaces away from a diagonal and you push a new block onto that diagonal. After the first time step, the block is one space away from the diagonal. On the second time step, it pushes the stationary block onto the tile three spaces away from the diagonal, so you get an object three spaces along the path in only two time steps. You can use this trick to synchronize the button presses even if the paths aren't equal length.
Steven, after having made the square block I lose the bomb in order to regain the othe square glue block that was used to access the elevator, I can no longer move the diagonal block and one of the right blocks is inaccessible on top of the button in the far right corner. Am I still able to progress with these restrictions?
It sounds like you are making the square block correctly (those restrictions are all planned) but you may be stuck unless you already have a diagonal made. You can make the first diagonal at the same time as the square block. You shouldn't need to change the way you make the square block much, it just requires some extra setup. Let me know if you want more details.
I’m wondering if you actually think anybody would be capable of solving this puzzle without help.
Not sure what you meant when you said you can create the square block and the first diagonal at the same time. Literally, the same time?
Just to be clear, my setup sends the block headed to the upper left button directly. The path to the lower button is one space longer so there is a stacked block to account for the timing. This path hits the button from the right side (also can be changed to hit from above which has the effect of 2 blocks being pushed downward when the piston fires.) Either way what I’m left with after making the square are the two down blocks and one right block on the platform. The left block that I pushed onto the diagonal to put the other 2 blocks is motion is now resting on the right extension of the middle pusher. The pistons of the middle and right pushers are fired. Can’t go off of the platform to rearrange anything without being stuck on the ground level. What is left other than to somehow (still inconceivable to me) push blocks down the lower path and trigger the unused piston?
Make sure both blocks you are using to make the square block are sticky. You can put a downward block on top of one and a rightward block on top of the other and the diagonal will be formed directly on top of the square block when the pistons trigger. The extra setup is moving the rightward block over to one of the pistons before getting onto the platform with the blocks. The third piston is for making the second diagonal, which happens after dropping back down from the platform.
I'm not super happy with how the puzzle turned out. I missed a lot of moves (mostly alternate ways to form the diagonals) and it ended up being more difficult and frustrating than intended, though I do know of two people who have solved the latest version without help.