Exactly!
As far custom metering rod shop, it might be you. Sand paper will take the metering rods down, and I think you can get creative on where they need to be filed down. I've done this before more than once with great success
Yep. I prefer a micrometer but you can use a caliper to measure the metering rods. Just sand them down to where you need them.
Don't forget...there are 3 different accelerator pump nozzles for those. I forget that they came with but I think it's the middle one.
You'd be surprised what a bigger nozzle will do for you. Sometimes they want a big hit of fuel, very quick. The smaller nozzle gives a smaller amount of fuel for longer.