My experience has been that for larger size versions (size 4 and larger) you can use the same hook size for the front and rear hook shanks…but for size 6 and smaller, the pattern looks better (to me) to use a rear hook that is 2 sizes smaller than the front hook. So, like a #8 for the front, and a #12 for the rear shank. But that could be because I use the smaller size Palmer Chenille on those smaller Jointed Minnows.
Experiment and see what works for you.
With flies like these I have had issues with using mono for the connection, several came apart very quickly. Though I haven’t tried Mason Hard Mono, that may solve the problem. The solution I used was to make the joint from two strands of wire twisted together.
Cheers,
A.
To articulate the Jointed Minnow you could add a looped wire extension to the front of the hook and tie onto that.
I use .020, .025 or .030 stainless steel welding wire with a loop on each end (depending on size of the hook).
Thread wraps will secure the loops. To make the loops you can use a fishermans jig-making tool or jewelry pliers with rounded jaws.
I read about this connection in a Flylife online tying article where they tied a hatchling.