Thanks a lot, fellows, for welcoming!! You all are so friendly ...
Answer to magicheater:
Yes, these are the 3ph buckets on both tractors. In fact I'm going to sell L tractor. Just my wife likes it and tries not to allow me to sell. She drives and now uses that bucket for flower gardens bringing the plants, bushes, dung and whatever in it.
But last year I had been working in a forest with that bucket. It helped me to get out about 50 m3 of wood from the forest. The trees were cut in about 1,5 m long according to the width of that bucket to be able to load them inside. I found a good idea to clean a forest from rotten trees using this unit and saving good trees from being damaged because of mobility of L tractor and good productivity of a bucket in the narrow spaces between the trees.
I might say there are plenty of other ways or demands to use 3ph bucket in the farm's everyday life including organic farming (I'm not doing that), carrying ground, stones, snow, vegetables, fruits in small quantities.
In my opinion each farm tractor should be equippet with a simplified 3ph bucket. Simplified means WITHOUT TOP CYLINDER COUPLING. Indeed you may use a cylinder, and probably I will add it on a M tractor (I have a single remote valve on it). But only then, when the future will show the needs. The attachment design (my own) of both buckets is different. To dump a L tractor bucket you need to get out of a tractor and to remove a fixing finger of a top link. On a M machine - you stay in a seat while dumping. I may send some more pcts later if You are still interested. The design idea is very simple - to over tip (if correct in Engl.) a bucket you need to make top link moving downwards while the 2 lower points of rods are moving upwards in a lifting mode. Most inportant is to find a 3rd point location on a bucket for the top link connection so to prevent it from being touched by the PTO shaft.
I also have rear dozer blade, rotary tiller, drum mower, trailer.. I'm also rebuilding my grandfather's plough (about 100 years old) which I'll prepare to be attached to a tractor.
Sorry for my weak English
One more pct attached