putting engine back together after replacing head gasket and servicing valves. Cant seem to get keepers back in valve seal retainer . Machine is a 2006 case 410 with a shibaura engine . Various spring compressors are slightly to large to fit in the small space . Also lisle install tool 36200 is to wide . Has anyone used the lisle 36050 since its apparently a little narrower . thks bingoo