Building own 3pt hitch for x700 - Cat 1 or Cat 0?

I use a front blade with 4 way hydraulics and i wanted be able to use a 3pt, however there wasn't enough hydraulics to go around. So for my 425 I bought a Kolpin dirtworks 3pt hitch and I like it. However the electric actuator doesn't have enough guts and is slow.

I do like that the hitch is removable for mowing and isn't hanging off the back when I don't need it. So I have already made the receiver hitch for the x700.

To sweeten the deal on the 425, I want to include the kolpin 3pt hitch or maybe sell it separately instead of reusing it on the x700 due to the faults.

However I will "borrow" the design and build one using a hydraulic cylinder and the boat trim motor pump. borrowed the idea from another MTF member, sorry I will give credit when I remember. He used it to lift his snowblower on a 300 series JD.

Do I build the new 3pt hitch to use Cat 1 or Cat 0 attachments. I am leaning toward Cat1, since the are more readily available. To my knowledge the major difference is the pin size and distance between the pins. Am I correct?

I know I won't be able to use a 6ft box blade due to limitations of the x700, but it is easier to find a 4ft box blade and rear blades in cat 1 than cat 0 used, which is most of time cheaper.

Let me know your thoughts, Thanks!.