Here is my repost on this issue:

Hi John,

Its not actually oil loss that’s a problem its oil pressure loss. Where the oil filter bolts onto the engine you will see that it does not bolt directly to the block. It bolts onto a cast metal item which is attached to the block. This cast piece that sits between the block and the oil filter is one of the main problems of oil pressure loss. Inside it there is very sharp bends which restricts oil flow and therefore oil pressure.

We solve this issue by removing this cast piece and have it replaced with another fitting that allows the oil filter to be remote mounted. This will be available for purchase shortly.

The other issue is only when the engine is pulled down. The oil feed system to the main bearings comes in at the number 1 piston and travels along feeding the others. This means that the number 6 piston is the last one to get any oil fed to it and is why the number 6 bearing is prone to failure. We have a modified oil delivery system available which rectifies this problem and gives even oil flow and pressure to all main bearings.