Silix is a fine base. Mine is a Cartel base with a high beat 2836 only because I like that movement and also it takes Helenarou dials and hands, but they are similar. Most of the modded 6538s you see here are Silix 21j based.
Dumb question, but is cartel a manufacturer? From what I thought from reading various threads, the cartel base was what silix was selling. Are they one in the same?
your watch you posted above is really nice, where did you get your dial and did you do the aging of the bezel and hands yourself?