Many times "life's lessons" are costs in: time; experience; mistakes; blood; money; embarrassment; and other costs too numerous to describe in one entry. Today's life lesson was a small amount of money ($10.57) and a great deal of time. Today's life lesson begins with Service Bulletin #2 on page #1. This simple precautionary addition of a couple of about 3/32nds of an inch of angled 4130 steel. Now we go to page #70 where 1/8th of an inch of 2" x 2" alum angle "iron" are added. No big deal right? But adding thicknesses of material changes the length of the bolts needed. AN5-30a bolts are called for so I figured: hell I'll be safe and order AN5-40a's to give myself extra room. This gives me an extra inch to tighten the bolt and I'll just cut off the rest. Experienced builders will at this point say: "oops, he doesn't know about the short length of the threaded area." Yup. Too short So fortunately there are AN5- 32 and AN5-33 bolts in the parts list. So I place those in the holes. Still too short - I think - I want the min of 3 threads showing after tightening them in place. From the looks of it I could fit AN5-33's in place but no threads - so for about another $10 to AC Spruce I will order AN5-35's