Some pictures of the plough built :
@ cj : the front linkage is made to fit on a lot of tractors. some exemple with Claas Ares, John Deere 6010/ 6020, Case CVX and there are other possibilities (New Holland TG, Mc cormick for exemple).
It is true that some frame requires more work to adapt the frontlinkage.
The frontlinkage can also hold anything up without stick anything. Here, an example where the axes are replaced by screws http://forum.aceboard.net/7381-1860-33325-5-PMA32-site-consacre-miniatures-artisanales-agricoles.htm
If not, the painting of the rams makes force the linkage : http://forum.aceboard.net/7381-912-36570-0-MODIFICATION-tracteur-class-ares.htm#vb