I'm going to start a 4*60 bash build and was wondering if I could add Robart mechanical retracts. Has anyone tried to retro-fit retracts into a plane that does not have that option? I know what I have to do, but wanted some input from you guys.

What did you plan and end up doing from a reinforcement standpoint?
What should I be concerned with or be on the lookout for?

Is this a bad idea? or better yet, is it not a good idea for the 4*60.