The funny thing is that these solutions come and go.... And not everyone are using them.

I have seen this on tank caps already 15 years ago and on engines it was with the Orion CRF Wasp.

If you are not using a one piece engine mount it is wise to check the 2 mounts and make them flat when mounted on the engine. If they are not equal there is already some force on the crankcase and the flex in the chassis can enlargen that force giving a load on the crankshaft giving several kind of problems.

When using a fuel filter it is wise to check houw it is mounted and give it a try without it.