306's mainly use M10-M35.. but even a simple set will have most that you need. Are you buying individual T bars? if so don't bother id recommend a simple multy bit 1 hadle screwdriver attachment style, if this makes sence. As for your Eglish, well we like our frogs well done and my typing is as bad as i gets here.-chris
I was thinking about a set of screwdrivers which is similiar to a swiss pocketknife.
In that case, I would have all of the sizes I need. I just wanted to be sure that the tool I'm talking about is fit for my purpose.
BTW - are you sure well done is the best way to cook a frog?..