"tony sayer" wrote in message
...
Hole punches for transformers? Like, big square shapes?


No, but nothing to stop you using them for 'starter holes' is there???

Tell you what is useful for odd shaped and even regular shaped holes in
ally is using a router designed for wood use!. I have a cheap trend one
for some 30 quid and some cheap bits for same. There is a very small dia
bit that has lasted very well cutting all manner of shapes in 16 SWG
ally sheet. Even if you waste a few, their quite cheap from the DIY
sheds and do work very well...



Interesting tip, but fortunately I'll not need to address this issue on my
first project as I'm expecting top-mounted trannies as in:

http://www.apah69.dsl.pipex.com/keith_g/show/2a3b.jpg