Separate the GP wire from the plugs (they're good) and turn the ign key to activate them. If they're getting power at all you can skip an electrical load test.
A 'dry' compression test (sat for a while) is expected to read low. Rings may be coked and stuck, so the long soak might help to free them up. Getting up to op temp will help too, so I suggest re-checking after each step. If one reads low, that's be the one I checked every time but wouldn't read too much into what the others will do right away, nor would I change the oil too soon if it's not dark and opaque.
This model has no fuel pump and is indeed gravity-fed. Filter quality/condition, and condensation in the line to pump come into play. BTDT so note what comes out when bleeding from inlet or lines
btw, I have the complete manual for TC29 & TC33 and can share pages by PM or email, so don't forget.
