Yes, I started with Edmund Clays GRAC2 but it was too limited so I developed a few more procedures and revised his source code & added more buffer space with AMOS Pro so I was able to do what I wanted. Now I'm trying RedPill for an AGA platformer , but there just isn't enough documentation to help me along (I'm an old fart lol) , so I'm learning Amiblitz (slowly.) there is familiarity having worked in AMOS so I'm slowly getting the hang of it and building it from the ground up.