Seen many start out wanting to make a 4 cylinder or V8 ( Mustangs and Spitfire for r/c trainers too) and then find the complexities overwhelming and just plain give up and that's why I mentioned it.
The single cylinder does indeed have practical use and many have been fitted to boats and whatever in the past over here. Not bad for year 10 kids, and better than bending up a dustpan for metalwork prac.
The problem of the valves is, most will make the valves with the angle cut, then go off and do other things, then come back at some later date and do the guides and seats.
This is where they come unstuck.
You can get by on a sloppy piston fit or rings that are not yet bedded in by running up with a good starter but if the valves don't seal properly, no amount of high speed starter(or anything else) is going to help.
Never used a Taig but on my Myford, the top slide can be adjusted to any angle and used to cut both the seat and the valve face without moving the top slide angle whatsoever.
Guarantees same angle on both seats and valve face.
Taig if I remember are fairly small machines, are you sure it will be capable ?
For the cams I built a cam grinder machine, same for the crankshafts, purpose built machine BUT I have seen some do pretty good work with just a basic lathe and mill.
Plenty of good info out there by those who have done so.
Ignition has been bench tested and all seems ok .
Proof will be when George finishes off his 3 cylinder 4 stroke 50cc engine he built for a scale diesel loco in the coming months.
