I have just gone out and bought 45 degree chamfer bit and realized that it it too large for the hole in my OP plate.
I would like to buy an OP 11 x 11 plate with the larger hole and probably some other gear.
The problem is that OP will not post to Australia.
I would like to see if I have any friends on the forum that would act as a postal relay for me.
A forum member that has been absent for some time used to do this for me but we haven't seen Mike for some time.
Do not reply to this thread, but PM me if you would like to help.
There is no bad feeling if no one comes forward. ( You don't know me from a bar of soap).....
PS I am good for the postage.......
Save your time and your money. Make your own baseplate, using the existing one as a guide. Then, get yourself a 3 1/2" hole saw (for an oversized baseplate, but if you're going to do a lot of joints, make a bit-specific baseplate) and, using your drill press, drill the over sized hole you need for bigger bits. Makes waiting for parts from a reluctant vendor much easier to swallow.
I used my stock router base plate on some 8mm (=3/8" ?) polycarbonate, carefully scribed all my measurements and lines to be sure that everything lined up properly. I took my time and deliberately checked and rechecked everything many times over. I also looked for a variety of ways to check my measurements.
Here's a tip, when you do your layout, use diagonal lines to set your locations. Remember, on the table mounted baseplate, it is not critical that the bit be perfectly located in the centre. It is only critical on the 7" square baseplate where you have to have a consistant centre.
Something else, check to be sure that your drill press will cut a hole square to the plastic. I took a tall object put it up against the drill bit (in this case a forstner bit) and rotated the bit. If a gap appeared, I reset the chuck and started again. It took about 20 minutes to get my drill bit square to the plastic.
My first try was nerve wracking. I can't easily get plastics but I would suggest that you do a few at a time. Rather than cut the full-sized centre hole, that you merely leave a tiny pilot hole and cut as needed down the road.
However, a stiff upper lip and all that. You can do it and it ain't difficult, just be patient and deliberate in all your actions. If you want to try a dummy, try it on a piece of 1/4" plywood.
Hope this helps.