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