I do. My WA5-LE has all the electronic upgrades, Teflon sockets, EML 300B Mesh, Several different tops NOS drivers and several different top rectifiers including EML 5U4G Mesh and USF 596. The amp also is internally wired with all Neotech OCC copper wire and Cardas Eutetic solder. The only thing missing to be TOTALLY upgraded is the RK50 pot but I did not want to pay another $700 for that.
My HD800 are recabled with the Zeus cabled and the internal wire connecting the inside of the connector the the driver has also been replaced with the same Wireworld wire used in the Zeus.
IMO those HD800/WA5-LE sound excellent and to my taste the best open headphones (I also have the T1 with the Zeus). My 3 favorite headphones with the WA5 are the HD800, HE-6 and W3000ANV. Each at the top of the list within their own design. Now, which is the absolute winner of those 3 regardless design IMO it is a very close call between the HD800 and HE-6 to really declare a winner and the W3000ANV is just a 'hair" back but again it is a closed design so the soundstage is not as big (but it is very big for a closed headphone).