Created my own -12 fittings for use on the lower tanks. They seal with o-rings, both internally and externally. Instead of teeing off the upper/lower interconnect hose for the aux. fuel, I placed a -12 fitting on the fwd. side of the left tank. This should allow a better view of the trans. oil sight gauge and avoids plastic tees and hose clamps. Modified a screw extractor to use as a means of securing the internal Eagle R&D 0-ring fitting to the new 37deg. external fitting.