I could be greedy and say go make one compatible with K800 since it is a new phone but seeing you have a W600 you can make one for yours which is also compatible for W810 models or for K750/W800 the differences are so small. the only difference I recall is input 1 on your phone is larger so it's really up to you. It is always good to make themes for your own phone model for testing. The major problems we face are gradient issues so I'd stick to small screens fro now and pray you get a p990 someday to use your themes hahaha or at least k800 or something. Well any way if you need anything don't hesitate to ask.