In this video I replace the SIN, COS and TAN primary keys with pi, fshift and gshift functions. This makes using the C47 calculator far more efficient.

Then I modified the CPX, STK, TRG and CLR menus, putting the functions that I use the most in more prominant locations.

Finally, I added a HEAP to my C47 calculator. I can clear the heap, and then push and pop variables from the xlevel of the stack on to or off of the heap.

These are the most recent customizations that I have made to my C47 calculator.

NOTE: In the video I mention getting stickers for the keys from spiff72. Here is a link to his offerings on teh MoHPC forum:

https://www.hpmuseum.org/forum/forum8.html

On this page, search for spiff72, and look for the thread titled, "Adhesive/tabbed overlays C47 & WP43 (DM42), WP3xS, DB48X, newRPL variants!"