Install built up engine into airframe all pretty straight forward.However to ease the process I would recomend putting the top centre engine mount bolt in firstfollowed by the others leaving the left hand lower bolt till last,you may find a little mis alignment,I took an old AN4 bolt and chopped the headf off it ,the threaded end ground to a bullet shape and offer this thru the hole followed by the correct bolt.A quick rap with a plastic mallet done the job alignment bolt in alignment dowel out .Oil lines manufactured and covered with heat sleeving and installed on engine.Engine wiring manufactured and loomed into place .