Having started my project of a generic 2 jet c/pit I have come across a problem which some of you may be able to help. As an example I have bought 2 car seats and made box sections for the runners. Because I must be able to dismantle my project (mainly MDF) does anyone know of a fastening that will allow constant assembly/disassembly of "T" sections of MDF that are not too obstrusive?Regards and a Happy New YearIan

I'm not sure what they're called, but your local hardware store should have these. You drill a roughly 1" dia hole through the "leg" of the T, and put in a metal disk that has a tapped hole in it. you then drill a roughly 1/4" dia hole "down through the top" of the T, and into that goes a hollow sleeve. A regular bolt then goes through the metal sleeve and is screwed into the thread in the disk. They're used in most of the better quality flat-pack furniture you can buy (Cheap stuff just uses screws) and I've never had a problem finding them for home projects.Richard

T-Nuts also work well. They are flat washer like nuts with spikes. You hammer them into the plywood then a 1/4 bolt screws into the nut. Just make sure you put them where the pulling force pulls then into the wood, not out of it.They are cheap, cheap.John