The way I do it (to prevent lines all over the HSD) is to go 2 up from your last Steerpoint. This means it’s not linked in any way will be a standalone point on the HSD
Viper cannot tank off the MPRS. Only the KC-135 boom tanker
As such, the MPRS will give you a stiff ignoring. IRL, MPRS will do both boom and drogue, but not in DCS
Still put the DL switch on. Also, how are you aligning the INS? Stored or Norm? If Stored, do not enter to accept DED coords
if Norm then the reverse of stored
in both cases, wait for flashing ALIGN in the HUD before setting INS to Nav