Quick Wiring Question - Strobe Lights

Wanting to install some of the Honda style pedestal lights above the headlights on my W900 B model that I pull my lowboy with. They'll be 3 function lights, that I'd like to have run my marker circuit steady burning with the rest of my marker lights, and be able to choose between running on the turn signal circuit when unloaded and be able to switch to an alternating flash pattern when I'm oversize.

I'm thinking unless there's some real neat control module out there, I'll need to run back my wiring on the high circuit, red wire, back to a switch in my cab that would need to be an on/on switch (if they make those) or an on/off/on switch to switch between standard turn signal mode and the strobe mode. This should prevent any backfeeding to my fender and mirror turn signals, which I believe that the DOT boys would prefer to operate normally.

Have I got this thought out right or am I forgetting something?

 

Thought about this a little more today, I think I can do what I'd like to do basically by running a double pole / double throw on-off-on switch backwards.

As matching the picture having the 2&5 labeled terminals going to the red hot side on my marker lights, the 1&4 terminals going to the respective side's turn signals from the factory wiring, and the 3&6 terminals being the feed for the two side's respective alternating flash pattern controls coming out of the LED strobe module control box. Would also obviously have to have a standard on/off switch to power the LED strobe module.