Out of all the ARFs, H9 and SIG still seem the best for the least amount of "quality" errors ie: no glue on engine mounts or just plain poor workmanship. However, I still add about 20 hrs to an ARF for inspection and repair of the mickey mouse mistakes.

Now, you seem to have taken an even bigger gamble by using an engine that was not "common" to the ARF. I had this problem with some in that it seems they were all built to accomodate a two cycle .40. To put in anything other than that, add an additional 20 hrs.