I have a bl kit for my dx7s. You can buy them for about $14 on four different colors off there and whomever is the seller usually always sends u instructions on how to do it. Beware i take no liability and you are doing this at your own risk, the spektrum tx s all require u to do alittle bit of soldering on an onternal wire or two but i believe this will void all warranty that u may currently have, the kit just includes the bavklit lcd type screen out of a turnigy tx atleast thst is what i recieved, for the most part if u feel comfortable with soldering on a chip board close to other connection and believe u can do it clean enough to avoid the other connections its not that difficult just remember ur taking the chance that if u mess up it could mean u now are the proud owner of a large paper weight. Once again i assume no responsibility nor endorse even breaking the seal to the tx cuz it will void any warranty u may have. Tom