Mark,I try to use a stretcher that fits the size of my rat.
Peerless stretcher is much wider than others being made,and granted squeezing them works on the larger rats--I have had small rats ripped in half when I have squeezed the peerless and let go to insert the hooks.
They work well for those super large rats that sag a bit on my other stretchers.
I have some Herters stretchers that I squeezed down for my smaller rats.
I too have received kudos from my buyers over the years on my rat put up.also won several awards in rat competition put up.
A tip on rat finnishing---buff those pelts before selling,especially if you are shipping to auction.
I take a soft rag and rub down each rat pelt,this spreads the remaing fat and oil over the entire pelt--softening it a bit --taking away some of that crackling noise and putting a shine on it.
Rats---you gotta love em.
Tom