Has anything ever come out of the ideas for a new HP 39gII firmware?

[Presser]

I have been a fan of HP calculators since 1974. I have several models and despite all the bugs, the hp 39 GII is fantastic. The latest firmware version I found and installed is rev. 19148 (30 / 0ct / 2013). HP prime programs are almost fully compatible with the 39GII. I installed some chemistry programs and with some changes, they worked perfectly. Some problems encountered:
1) The "CASE" instruction does not work.
2) The instruction "MAKEMAT" when used I, J in the expression, uses them inverted (J, I)
3) The integral calculation does not accept some values, such as the integral from 2 to the square root of 20. It is not reliable.
4) Some powers of complex numbers give wrong results eg (0.1,0.2) ^ 3 gives totally wrong result
- do (0.1,0.2) * (0.1,0.2) * (0.1,0.2). It is not reliable.
There must be other mistakes that I will discover over time. The programs run very quickly.