The plans call for 6 tabs with only 1 on the right hand side according to the drawings. Not sure why. I have 2 on both sides and at station 2 and at station 1 I have a tab in each corner. To hold the tabs level for welding I had to create a holding platform out of 5/8" tube with a channel ground out of it which makes it easy to clamp to the round fuselage tube. The tab sits on top and a scrap piece of steel holds it level for tacking a weld.
