WELL, I HAVE NO ACTUAL BUILDING EXPERIENCE, BUT AFTER OWNING MY OWN KITFOX MODEL IV 1200 FOR THE PAST 5 YEARS POWERED BY THE ROTAX 912 ULS I HAVE GAINED TONS OF KNOWLEDGE ON MAINTANCE AND REPAIR! I HAVE REBUILT MOST OF MY ROTAX 912, AND TAKEN APART AND REASSEMBLED MY KITFOX! I HAVE GAINED SO MUCH KNOWLEDEGE THAT OTHER KITFOX OWNERS HAVE COME TO ME FOR HELP AND ADVISE. I HOPE THAT THIS KNOWLEDGE WILL HELP ME BUILD AN AWARD WINNING THATCHER CX4.