Gees , you lot . Reading a olde magazine , last night . !
OS came out with the rear Intake 60 , and did a ' INTRIM ' 58 , based on the Max 50 . Which was a development of the Max 49 .
http://sceptreflight.com/Model%20Engine%20Tests/OS%20Max%2049%20RC%20%283%29.html looks like THAT .
Ifitsgotta hole mid hight , aft . On centerline , Thats for wrist pin extraction .
Otherwise soaking in solvent , A allen key , bent wire etc - to get wrist pin going for & aft IN PISTON . or V.c.V. , so the rod falls of the crank pin . We Hope .
Theres some DISASEMBLY videos on you tube . The 58 should be good , light, conservative timing , etc . So dont get aggro - Few parts on Ebay, too. I think .
Pieces should be similar .