I'm willing to talk about anything puzzle related! From twisty(I'm known as EMarx on the twisty forum), to padlocks, puzzle boxes and anything in between.
I'm always looking to acquire rare, hard-to-find, and limited production padlocks. Please do contact me if you know of any recently released trick padlocks, limited runs, or have some you intend on selling yourself!
(Shameless self promotion)
I have an extensive knowledge on padlock mechanisms, from antiques to modern day productions, and can serve as apt fore-runner for any new design you may consider bringing to market.