Hello all, I have an '82 M20K, with a G530W and a King KAP 150. Works great, still learning how to fully use it as I get my IFR training.  I have been looking at possibly adding a DAC GDC31 roll steering converter to add GPSS capability. When I talked to some of the local pilots, they mention that they usually only fly heading mode anyway, so didn't know if it would be worth it in the long run. Thoughts/Ideas/Suggestions? I found a used one for under 1 AMU, but wasn't  sure how bad the inst