23-08-2022, 08:20 AM
Thanks for the comments Ian and Alan, both are very useful. Just to add another layer of information, the original design of the Speedex head pictured below (not mine) incorporates a space above the pistons. This is not carbon build up before you ask, but the edge of the recess.
Screenshot_20220823-080900_Gallery.jpg (Size: 216.18 KB / Downloads: 217)
