i am sure you havent missed my Quark AA XML review ;) (not too many people seem interested in it so i will complete the review when i am done with my other reviews like lumintop worm and tank e09) -- because of its price, it's nothing i would gift to my friends. It certainly is the best (=most versatile) and beats Xeno and P1A and Balder in many ways (except for price, tint and built quality and ..etc.. lol)
i meant the Fenix LD10, of course. has clip, can tailstand, looses modes on 14500, supports the fantastic wealth of Fenix diffusers tips, caps, and lenses, etc.
The LD20 clip on the e03 is/works "okay" .. but i am just saying that i personally (kreisler) dont recommend it. you could still use it .. many people (bfl, cpf) use the LD20 clip on the e03!!
Users with the shiningbeam clip (bfl, cpf, ..) could tell you more about it, how well it works with the e03. Looks? okay, matter of taste.
I wish myself the P1A had a commercial diffuser lens cap. (i've ordered a diffuser tip cap instead. it's better than nothing.)