I stumbled across an old thread talking about U2, an improvement to R2, which you all know is generally regarded as bad. The idea is similar, but you setup to UFR and use U2 to swap with UBL buffer instead.
The problems with the older thread:
Special cases sucked
So I have...
this method is basically improvised R2 and it uses the same idea.
idea is to insert the target at URF and do U2 and undo the insertion.therefore in the form of ABA'.\
note:when executing U2 UBR and UFL gets switched.