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Not much happening over the last few weeks however have completed the two heads. I think I have learnt something about my DRO. I used ABS and INC reference to set the two zero points for each head, as I was machining them from one piece. The last operation of machining the two valve holes on...

Flywheel weekend. Found a nice 3/8-24 nut at the auto shop which is actually a head stud bolt, has a star head similar to (but not) torx. Made a colar around it with a three point dog. I will put a pin between the collar and flywheel to stop it undoing the nut when starting. I didnt have 3”...

From 3.9kg to 500g. No wonder my wife has been seeing glitter around the house for the last few months.

No turning back, I think I simply overthought my issue....

Thanks @gbritnell , I went ahead and drilled the lifters and all holes in the head. Exciting part next weekend in machining the rest of the block away to reveal the "V" :) I did a quick pic and I assume the actual contact point between the cam/lifter probably doesn't shift and the...

The easiest fix would be to change the rocker arm dimension and its pivot point. The right Cam is going to be the opposite issue it being further away from the pivot. There got to be an easy fix ? or compromise, is it really going to matter for an engine that will never see any real load ...

Oh Dam, Guess who did not indicate vertically the gear cover position based upon the two circle centres... When I made a gear cover I never squared up the blank as everything machined from the two centres. So when I came to align the gear cover on the end of the block I stupidly used a...

The test hole went soo well and clean. Today the final cam holes didnt do as well, maybe the speed was too low and didnt clear the swarf anyhow now have two 1/2" holes and the bearings drop in and locate OK. Overall the dimensions seem to be comming all together which is my biggest relief.

Had a test run on drilling the 1/2” cam shaft holes on a scrap piece I practise on before committing to the real thing. Purchased a long 5mm jobber drill and then went through with the 1/2”. Setup seems ok so next weekend will commit to the cam shaft holes and gear CB detail at the flywheel...

So for someone who did machining in the 80's as part of an apprenticeship, built one steam engine in 2019, take on a Jerry Howell V4 ? Better not answer that as it is very optimistic / naive I will admit , especially when it seems every single tolerance is soo critical. I must be 150...