After an overhaul I would do the first oil change and oil filter internal examination at 10 hrs for two reasons.
1) The purpose of the break in is to rub all the pieces together so they mate properly. This will inevitably result in crud in the oil, therefore an oil change will remove the debris rather than have it continue to be circulated in the engine.
2) An early examination of the filter will reveal any gross contamination caused by failing parts (usually due to improper assembly).
In general private aircraft should have the oil changed every 25 hrs or 6 months as it is lack of use which is hardest on a aircraft piston engine. Regular oil changes gets rid of the acids and other nasty combustion
byproducts before they start to rot the engine from the inside out.