Brother Sevens,

If you have big enough tubs of each part, you can mix and match until you get pretty good fit. It’s only when you have one of each part that you have to work at getting them to fit. Then again, you have to care and have a little pride in your finished product rather than just trying to slap together as many units as possible by the time the whistle blows for lunch. But you knew that, didn’t you?

Froggie