TB,
I,ve one of those action wrench's mine was the universal one ( the clamp was a a V block that screwed to the wrench), in the past I,ve made several adapters basically to fit the initial wrench part, but with the profile of the P14 / M1917, No4 etc actions etc, I would say in most cases I,ve had to use a cheater bar/ pipe (the pipe handle off my big trolly jack) to free up the action/body.
Can't vouch for the adapter plate for the SMLE/with the cut out ....
Its stood up to some extreme brute force in the past...... for what it is the price is a bit OTT in my opinion but you can adapt it even to use with MH actions, ( I bought mine on ebay years ago for peanuts) am sure a machine shop or apprentice training school / college or similar would knock up something for less cost, as for the barrel clamp etc, I,ve just made them....... (see second pic) the two clamps are made to take a square section of wood drilled and tapered to suit what barrel then the clamps with the wood are placed in a heavy duty vice, I,ve an all steel one made for the No4 barrel to fit the knox form.... (not pictured)
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