My BX25 has similar 3 point hitch concerns. (BX2360 tractor with factory backhoe)
I was Bush Hogging with a 4' cutter.
Over a period of say 10 minutes, it would "droop" and end up cutting too short.
Also, the closer to the ground you get, more rock strikes.
I did a bit of research and soon discovered that BX machines do NOT have position control.
They are equipped with a three point "quarter inching" system with no real defined purpose.
On the rear of my tractor there are two bolted on steel brackets with a hole in each. (factory installed)
I ended up adding two sections of chain, two quick links, and two clevis attachment points at the lift shaft.
It is slightly more time consuming when you are changing three point attachments.
It's also extra steps when changing three point height adjustment.
I only Bush Hog once a year at my recreational property.
The remainder of the time, my BX has the weight barrel on the back, or possibly the backhoe.
The chains added to a BX stops the "droop" on the three point system.
I can set the chains lengths and go Bush Hog for an entire day, and when done, the cutter height is right where it was when I started. If I recall, about a fifty dollar bill at Tractor Supply for the parts.
And being chains, they allow for tractor/attachment relative motion when driving over uneven terrain.
Since these two photos were taken, I have changed the top chain attachment point from bolts/flat washers/nuts over to the quick links which are faster when changing height adjustments and only require one wrench.
IMG_20230911_143055726_HDR by
cee_Kamp 32ACP, on Flickr
IMG_20230911_143039690_HDR by
cee_Kamp 32ACP, on Flickr