yeah, hopefully I'll get some footage up today.
So i swapped back to the esc's bec and the servo works fine (albeit very slowly being only stock voltage...) so what the hell is the bec doing!? and why do they go kaput?

A lot of electronics fail due to cheap components that are barely big enough to do the job.

I'll do some more testing this afternoon and if the bec has indeed bit the dust, whichone should I consider to replace it?
I just ordered a Savox SA-2273SG (some places list it as SB-2273SG) so a good Bec will be a must now.

Now that's a servo.