Tried them all none suited me, then used the sliding table on my table saw. Liked it but wanted something dedicated to hulls and not tie up my sliding table. Came up with this rig
It's half of a sliding table. Indexes underneath in the saws miter gauge slot. 4 holes, two will do 10 & 12 other two 20 & 16. You could run one (or two) gauges or perhaps get more than 4 holes. Top is spring loaded back off on the wing nuts it lifts off the shells. In practice get it set all you have do do is take a half turn off the rear wing nut !!! when the blade stops turning!!! and slide out the trimmed hull. I was indexing from the front of the hull with a stop using my regular full sliding table, but got inconsistent lengths off the hull mouth. Rear just use a pencil line scribed to set length.
Fast and precise, smooth cuts.
William