I've just finished a scratch built (in part) allwin, using an old Bryans cabinet and door wood pieces I had kicking around the shed. I happened to have a ball gallery from ebay, which is a must really. I didn't bother trying to build a payout mech, as this would have been months on the making, simply build a divert from the win holes straight back to the kicker, for a free game. I used Bryan's method of gravity to make a ball release mech, mainly trial and error on the grinding wheel to get the balance right. I used some old Bryans track I had kicking around, wish I had Oliver Whales grooved track, as this is much better. Having used ali strip in the past, I would not recommend it as it is too slow. Ball kickers can be made out of chrome door handles, one for the front, and the other to use as the kicker, with a bolt ground down to hit the ball. Use the thinnest stainless sheet for the kicker box and ball gallery, as it is hard to cut, and ali for bits that don't show. Sticky backed plastic is OK for the backflash, or green felt if preferred, or just buy a repro flash. Washers for the ball holes, polished and ground. Lift off hinges can be found on ebay, or make out of square bar, drilled and filled with nail cut offs. Lots more to share, but getting late.