We have a garden that was brand new last year. Nice black dirt and decent soil, but still quite compacted ground. Had a guy come with a GT type rotary tiller last year but it only got us about 3-4" of loose soil. I now have a 2520 and a 60" KK Pro tiller so I know I'll be able to work the ground better, but as I've been reading it seems that using a middle buster first would really allow some depth to the seed bed and get rid of that compacted soil.
So, being the type who likes to spend wisely (and I'm OK spending, but I hate to waste money) I figured it might be best to get a multi-purpose tool like a middle buster/subsoiler combo. The only ones I find being sold as combos seem to be for subcompact tractors and are built short for limited cat 1 hitches. For instance, King Kutter makes an XB version that is a combo but the max working depth is 6". I'm sure my tiller can already get me to 6". I'd prefer getting down to 10 or so. My 2520, while not a monster tractor, has full cat 1 and could take a longer shank unit.
My questions to folks (and yes, I searched but found very little pertinent info) are first whether anyone makes a full cat 1 middle buster/subsoiler combo that is not too expensive, and second whether any of the standard cat 1 subsoilers or middle busters can easily be converted by removing their blade and adding the other style end onto it (putting a subsoiler point on a middle buster after removing the plow, or putting a plow on a subsoiler).
Attached is a pic of the KK XB combo unit for reference.