I don't know, but does anyone make a Denso-style mini starter for WC Volkswagen's?
When I put the Quantum engine in my old 356 I thought that a big Bosch planetary gear 911 starter would certainly have enough poop to start a little 1.6l diesel -- WRONG! It was barely adequate if the engine was cold, but with the compression up on a warm engine -- no go at all.
I did a little searching and found out about the mini-starters. They are the Denso type reduction gear starters like the ones on the Cummins diesel in my Dodge. Much smaller and way lighter than the Bosch, I got one from a vendor on ebay for about $100. Let me tell you, that little bastard kicks azzzz! Warm or cold, it spins my engine like a top, I love it!
I just did a quick search and couldn't find one listed for any water cooled VW's, but maybe someone is making them, they're available for just about everything else --