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So here are the facts:
1) My engine is back together and the plane is flying again
2) The only parts replaced were CHT probes, seals, gaskets and overflow bottle.
3) Compression is 86,86,86,85
4) Full root cause is still not fully known.
Between myself and my Rotax guru A&P we have a probable cause:
1) A near gross load reduced climb & cooling performance allowing for increases in coolant and oil temps.