You and I appear to be suffering from the same addiction :-)

Since getting back into C/L a couple of years ago, I have collected old OS MAX series engines from .10 to .60 inclusive.

1 x .10 FSR-S (one of only two schnuerle ported engines I own, the other is a Norvel)
2 x .15 (one C/L, one converted from R/C)
1 x MAX-III .15 (absolutely beautiful engine!)
1 x .20 (C/L version)
1 x .25 (R/C version, now converted)
2 x MAX-S .30 (one C/L, one NIB R/C, now converted to C/L)
2 x MAX-S .35 (both bought as C/L variants, one was my original 'big' engine bought NIB in 1981, the other 2nd hand from eBay)
1 x MAX .35 "big shaft". Transitional model between MAX-II and MAX-III .35, called a 'combatnik' in the US.
1 x MAX-H .40 (had a hard time getting the venturi for this, now converted and a wonderful engine)
1 x MAX-H .60 (still in R/C configuration - beautiful engine but not sure about using it for C/L)

I'm nearly as bad with Enyas as well. My wife has given up hope :-)

cheers,
Colin