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The vices you are looking for are made by wintersteiger. You can also get the binding plates for use in the wintersteiger base grinder, but even if you dont have a grinder( which I presume you do if you have a tech shop) there usefull for holding the skis still when doing repairs to the base.
My fav type of ptex gun, are the ones where you poor the granuels in the top of the cyclider and they are heated up in here. Once melted the ptex is applied flat to the ski via the head of the gun. Work very well, but you do need two, one for black one for clear.
Hope this helps
I scored a sweet 130 mm toyko vice from the on3p crew a while back. The big center vice w/ two smaller support but side edge locks I think toyko still makes it. Rei used to sell a similiar red swix cheaper model that would do ~ 115mm.
Base repair guns like steigers polyman are the shits but $$$ or the other units they sell. Ive heard you can pick up a small compessor fed tip fed unit from online bulk tool outlets like harbor freight much cheaper and then use the poliwire.from stieger. I use the poliwire that adheres to metal for edge coreshots or if I really want the repair to last. I use a Hot air liester gun primarily used to weld pvc and tpo roofing materials to heat it and its pretty much a two man pain in the ass operation and pretty easy to burn the base if not attentive
I have a couple 11mm stick heat guns that I use mostly as I can ussually get a pretty good base repair the stick repair tends to crack and dry out over time so a good backcut around the coreshot and a warm clean surface are more important also they sell a metal rockered scraper thing that really helps compact that hot stick ptex so to speak.