Finally have my car back and all the hardware required to fit these brakes. Had an email exchange with Lanner and I can confirm that both me and my mechanic can't eyeball size any thing for ****
I have used Lanners brackets and hardware, 944 NA Disc brake arrangement, 944 NA Disc , 987 calipers and pads.
it was very easy to swap everything out and Lanners brackets make it a bolt on affair. I did shave some metal off from the inside of the outside pad however I don't think it was really necessary.
I think I should probably clean my calipers
So I've now got the cayman brakes all round on my notch, today's task is to change my master cylinders and get them bleed.