While I do not disagree, he has a few things there that could cause a problem after a few flights, the fuel filter being up against the engine is one that may work for a few flights then start causing problems (metal to metal contact, especially intermittent contact), what appears to be the shielding fraying on the ignition wire because it is rubbing on the edge of the wood and also looks like on the one engine bolt could be another that could cause a problem after a few flights, unprotected wires going through the fuselage.

Also something I just realized, there is nothing holding the fuel filter to the fuel tubing. Sooner or later, that tubing is going to swell and allow the tubing to slip off the filter.

It's his first gas setup and while not too bad, he did make a few common mistakes that may bite him later