I have the Holzmann HOB260NL, which is similar to the three you listed as well as several others, such as the Axminster AC250PT and the Bernardo ADM 260. Each of these share the same design flaw, so I would not be surprised if they came from the same factory.
I regretted my purchase a few days after it arrived because the infeed and outfeed tables were not coplanar, the outfeed table was not parallel to the cutter block, none of the three cutter blades were anywhere near the correct height, and I could not make any infeed table height adjustments. When I contacted Holzmann, I was told the tables and cutters could have shifted during shipment (very possible). However, since these were user adjustments, this was not a valid reason to authorize a return, but the technician gave me a list of things to check on the infeed height adjustment. I was able to fix the table height adjustment and set the cutter blade height, but did not have full control of the table adjustments.
I later discovered the problem with my P/T, and most likely the others mentioned, was each of the tables was attached to the height adjustment blocks with pins as well as the adjusting cam bolt. However, the cam bolt and the other bolt can be completely removed without affecting the adjustment of the tables. The pins securely lock the infeed and outfeed tables to the blocks and the tables cannot be adjusted on that side.
Here is a closeup of the Record Power PT107 showing the pins. The angle adjustment cam bolt is on the right between the pins and the horizontal adjustment bolt is on the left. However, both can be removed with no change to the table alignment. There are similar pins and bolts on the outfeed table.
Here is the Bernardo ADM260 showing the same problem.
Aside from the paint, my HOB260NL is the same as these two machines. I notice the Holzmann HOB260ECO is slightly different, but appears to have the locking pins.
After I used a drift punch to push the pins out, I could adjust both tables with ease. I double checked the user's manual to make sure I didn't miss a crucial commissioning step, but the pins are not mentioned anywhere except the parts diagram.
After a lot of work, the HOB260NL is functioning the way it should, but had I known it was going to be such a problem, I would have passed on the purchase and bought a Hammer or SCM P/T.