I forgot to order the coupler for the router. Can anyone tell me where to get it and what size I need to get? I found this on Amazon. Will this one work? https://www.amazon.com/Ruland-PCR16-6-4-Clamping-Coupling-Polished/dp/B002SJURZE/ref=sr_1_fkmr2_3?s=industrial&ie=UTF8&qid=1521775788&sr=1-3-fkmr2&keywords=6mm+x+3%2F8"+clamping+coupling
Thank you
Bill