So Jr.. whats your sawmilling background??
And tell me about the toe boards you are building please.
I learned how to run my dad's original model Norwood mill when I was a little fellow, maybe 12 or 13 years old, and got a fair bit of experience running it off and on over a 10 year span. It's probly been 15 years since I ran a portable mill though. Also worked in commercial sawmills for a few years.
The toe boards, I'll use a couple 3 ton scissor jacks floating on channel iron frames so I can center them on the log. Build a shallow cradle on the top to hold the log steady, and some extensions so I can crank them up & down using my Milwaukee cordless impact gun without reaching underneath.
Or,
I'll pick up a couple short 3'' to 4'' stroke hydraulic rams, and mount them in a similar way near 2 of the bunks. Plum them to the outside of the frame to a selector valve, and from there to a quick coupler, and I can hook up to my porta-power (hydraulic hand pump) to raise and lower them. The selector valve will let me run either front or rear if needed, depending which way the butt end of the log ends up on the mill. Again would save reaching underneath, as opposed to a bottle jack setup.
Either setup is easy enough to do, hydraulic setup will take a little more time and $ but still fairly cheap.