I am running Porsche 944 turbo brakes with CB performance dropped spindles. I have a sleeve that fits over the beetle spindle to accomodate the Porsche bearings. The sleeves I have available as a kit. They are $150 Australian plus postage. They are CNC machined . (You can see the front brake conversion under "Goliath" in the members rides.) I will be doing a production run again soon. If you want to order a set e-mail me and i will reserve you a set. P.S remember with our $ down under its 1/2 the cost of US$. Cheers David