Instructions for fabricating the vortilons can only be found in the M-18 drawing. The individual parts were simple to build. I followed the Plan, measured and marked the vortilon locations at the leading edge of the wings. Then I stuck strips of packing tapes at those locations. I used the recommended jig and projected the base of the vortilons onto the underside of the wings. Two layers of BID were laid at those locations.

As for the vortilons itself, I wet out a large 2-layer BID on the bench. Peel ply and trim to shape per the M-18 drawing.  

I started out with the 67 degree alignment jig (as shown in M-18) and hot glue it to a flat board as shown (left). Then I clamp the flat board onto a laser holder/stand. The laser holder/stand is like a camera stand. It has 3 height adjustment feet of leveling the laser. In this case, I use it to adjust my alignment jig.

To help leveling the alignment jig, I stuck a couple miniature bubble levels on top of the alignment jig board. By going back and forth with the leveling feet, I got the alignment jig board the desired location.

Satisfied with its alignment, I first 5 minute epoxy the edge of the vortilon to its base. There was not much to epoxy onto because the vortilons are quite thin - only 2 layers of BID. However, its adequate for my objective.

I wet out a large piece of 2 Ply BID and traced out patterns a bit larger than the intended shape of the vortilons. I added flox corners along the junction the vortilon and its base. Then I sandwiched the center vortilon with 2 BID on each side. Once completed, I peel plied and re-check its alignment with the mounting jig. Then let cure and popped off the next day.      

As mentioned earlier, the sandwich BID are a bit larger than the intended size, they need to be trimmed to size. Picture (left) shows a set of completed vortilons. All I need is to RTV them in place when time comes.