yes it’s on the router body, I’m not running at the moment waiting on parts for the vacuum pump and either building a new plenum for the shop dust collection or bagging everything up incase hurricane Irma heads this way, more concerned about that right now. We’ve been hit several times over the last 12 yrs… just trying to get my head around it all.
But when I held the vacuum nozzel next to the collet bit it really did pull more than I thought it would and I am convinced it does not need a boot to collect to debris. Your big router and huge bits will throw tons more debris and YMMV. Before you build your shoe, give it a try and see what you think, a 4 inch hose also may be difficult to sucure my way as I have a small vacuum cleaner hose and nozzle maybe 1 3/4".
It nice to see you gained from my post about my base and how I eliminated the gap below my system. Glad it helped you, makes me feel good about posting stuff.