3D Solex Matchless, tricks and tips please! in Modifications, third party add-ons & other hardware Posted July 25, 2016 You could see some brass and some chrome at the same time like it was "half removed". Good point. Like I said, these blocks are working well for me after tightening of the isolators. How about if I just keep these BV3s and let's see where this goes. Would a little filing of the top surface with a rough file help those parts mate?