OK, I solved the "why isn't there a name for a margerita made with rum ?" mystery. If you make a Margerita with rum and add a bit of sweet stuff it's called a Mai Tai...

... and it's a bit too sweet ;\)

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8