Well my (slightly modified) richrap 3dr is assembled, 24v 400w power supply, MKV-BV hot end, 24v Kapton heated bed - and everything works great - except the bed. I cannot find or figure out the settings for the 100K QWG-104F-3950 thermistor in Repetier firmware, so the bed temp reporting is totally wonky.
So has anyone got the settings for the 100K QWG-104F-3950 thermistor for repetier? Or can tell me how to translate the marlin ones?
http://www.ultibots.com/24v-kapton-heater-160mm-round/
You don’t need to change the thermistor settings in repetier host, but in the origin firmware, which is probably Marlin. In config.h you should find several thermistors to choose from. Uncomment number 80 and you should be fine 
Like @Tim_Hale_Freever mentioned, you’ll need to edit your firmware to account for a different thermistor - the popular Honeywell ones have fairly similar characteristics (beta value) to yours, so you can use the thermistor table nr. 7 for your bed.
Here’s the howto for that process: http://youtu.be/2RbcMvhatjU, the thermistor settings come up at 4:03.
The origin firmware is repetier - sorry I was tired when I posted originally - http://www.repetier.com/documentation/repetier-firmware/ - I was using it because of the online configurator - setting up the Marlin is no problem as it supports this thermistor - repetier does not. I guess if I cannot find a proper r-t table for it I will end up using marlin