So George, In your opinion, which would be a better choice ? Price not being an issue, its only 40$ anyways. Progress: 19mm , solid (confirmed today), not adjustable. Stillen: 28.5mm, hollow, 3 way adjustable. Things to consider : Its for a B15, front remains stock (no front bar available) Purpose is for lapping, I go at least 2 times a week minimum. Thanks in advance, Chris