Programming exercise (RPL/RPN) - Reciprocal Fibonacci Constant

[Werner]

How can the 42S code be 28 bytes, 41-compatible, yet the 41CV code is 33 bytes?

I have 27 bytes (excluding END, but including the three-letter label) on the 42 and 25 on the 41, stack-only. Of course.

Code:

>LBL "RFB"
 0
 STO ST Z
 1
>LBL 02
 1/X
 STO+ ST T
 X<> ST L
 STO+ ST Y
 X<>Y
 DSE ST Z
 GTO 02
 R^
 END

Cheers, Werner