i would suggest decarbing fully before loading into the spd.
i decarb all my crude on a hot plate open atmosphere in a well ventilated carbon scrubbed room (shit stinks!)
start off under vac and temp at 30c and ramp up slowly. i do incriments of 5c letting the mantle catch up to SV and then bumping up until i hit 160c.
if you dont decarb…same idea get all the junk under 160c out of the crude by throttling the vac making sure you dont overshoot the boil flask into your recieving flask.
watching vapor temperature or boil flask conditions, before switching to the cannabanoid fraction.