[ngoma]

So-- back to square one? Starts reliably when cold, starts OK when hot but not warm (after sitting 30-60 minutes)?

Low compression unfortunately can cause this. But you can "workaround" it for quite a while by forcing the GPs to energize when the engine is warm to help a low-compression start.

Simply disconnect the temp sensor for the GPs. It's the sensor at the rear of the head, almost underneath the rear camshaft cogged sprocket. This will fool the GP brain into thinking it is massively cold each time you turn the ignition key from off to on, and give max time for the GPs. You will soon get the hang of how much time to let the GPs sizzle before a warm start.

NOTE: This will tend to wear out the GPs sooner than normal.