Thanks for the feedback. If I were to pick one up it would probably be an Eltang or an Askwith morta devil anse. Both have nice thin rims.I dig it, especially this Eltang version. The rim of the chamber drops off very sharply into the bowl and it is bored wide for easy lighting. With good clenching form, this pipe is a joy to smoke.
I do have a Rattray's 'Misfit' teeny-tiny devil anse that is less enjoyable because of the rounded single-bore mouthpiece which feels awkward in the mouth and can shift more easily. The rim is also more substantial and it is difficult to light without charring. Solid but I guess when you're comparing it to an Eltang, it leaves you wanting.