I just worked that out too with help from the Spectrum facebook group :) I cleared the stack before saving but forgot to clear it before loading in the code - well spotted too. Will upload a TZX.
Viewing post in 3D Monster Maze in Colour - for the ZX Spectrum comments
Just had chance to test, works a treat, now to fire up Trans Express and get it onto microdrive ๐
Or if I edited the save lines at the end of the basic to microdrive versions would it work? It would be great if it did as I could do the poke to get it to save 2 copies on the cartridge for access speed and or data security.....