I’ve been in your situation before, and let me tell you… The easiest, most pain-free way of dealing with this in the long run is to suck it up and copy & paste your 23.98 sequence into the 29.97 timeline and fix the frames it has created in the transfer. If your final destination is 29.97, this really is the easiest way to go. If you stick with a 23.98 timeline and have an AJA or Blackmagic do the conversion to 29.97 for you on the way out of the box onto tape, it becomes more of a pain than it is really worth to do insert edits or pick up an output that has dropped frames than the time it would have taken to copy & paste into the new sequence.