On Sat, 19 Jan 2008 22:32:22 +0000, Steve Walker wrote:

Greetings -

Because our cat won't take no for an answer, we need to reinforce the
catflap against escape. The simplest solution is a slide in
'guillotine' panel which covers the whole assembly (insert jokes about
sharpened edge, baited with tuna etc).

I have various types of stout thin board, that's not a problem. But I
need some J-Channel to slide it in and out of. Something like 10-20mm
wide at the back, and 5-10mm wide at the front, and able to accept a
3-4mm board sliding in. Two lengths of 250mm would be adequate, sturdy
plastic or aluminium would be ideal.

I've seen similar stuff on the back of self assembly furniture, to hold
the hardboard back on. Common-sense says there's probably some way to
scavenge or convert it - cut-down electrical trunking, alloy channel for
fixing greehouse glass or summink?


Got a router or tablesaw? Or at a pinch (and if you dont value your
fingers) a circular saw?

If so, make a 20mm square U shape from any bits of wood and put a groove
down it using whatever tool does it best for you. A 'normal' circular/
tablesaw blade will give you a 4mm slot, more if you set the blade
slightly off centre and rip it both ways round.

Or, thinking creatively, let the bloody cat out. It'll come back when
it's hungry.