RE: asp piston on OS 46FX ???!!!!!
Elad,
The ASP S46A piston and liner set, fits into the OS.46FX with no modification.
It is not the same part, as the ASP set includes a chromium plated, true ABC sleeve; while the *original*, very expensive OS set is ABN/ABL, with less durable nickel coating.
Both pistons are high-silicon aluminium.
The ASP is a clone of the OS, so most of the parts are interchangeable between the two engines.
I wrote about it in [link=http://www.efly.co.il/forums/showthread.php?40890-%F9%F8%E5%E5%EC-%E5%E1%E5%EB%F0%E4-%EC%EE%F0%E5%F2-OS-46-FX]the eFly forum[/link].
It has also been discussed in this forum.
EDIT: Spelling.