ORIGINAL: Osirisf16
...One question: what is that ball link sizer??? I never heard of it and i think i didn't see it through the assembling of the raptor 50's manual
The ball link sizer is not mentioned in any manual that I know of. It is a tool to "shave" some material out of the inside of the plastic ball link to make it smoother and minimize friction.
If you are assembling a Raptor 50, everything that BH mentions here applies to you, did you read it?
[link]http://www.rcuniverse.com/magazine/article_display.cfm?article_id=836[/link]
Rafael