I clamped a batten to the table to use as a fence and 90 degree reference. This worked well but I kept bashing my knuckles into the batten. My batten was thick (a 2x4) and neither the Veritas skew rabbet nor the LN jack rabbet have tilting totes.
This was a problem of mine with using a batten. My solution was to use a batten lower than knuckle level. The batten is only needed for the first few cuts. If all is going well, the rabbet will provide a batten as it progresses.
Do either of your rabbet planes accept a fence? this could be used against the end of the piece being worked or on a batten on the underside of the work.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)