60psi is normal on thhe 12a.
The oil pressure sensor is notorious for failing and giving bad readings also. Don't worry about it. The 12a's rarely have oiling issues dies to the simplicity of their design. The OMP is manual.
It's actually very hard to blow a 12a. Don't worry too much.
For compression testing, use a genuine Mazda compression tester. Lookup David Girod on the RX7Club, and have him run the test for you. He can give you an actual printout. He also can fix the leak for you. He's pretty cheap, compared to shops.
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