The springs are to push the router up when hand held plunging. Upside down gravity takes care of that so it works better without the springs.
I think it's MCLS that sells some, but maybe Rockler and Grizzley do as well. They would be geared for using with a router if it came from them. I've heard that they can't be used with soft start but if you have no speed control then you probably don't have that either.
I much prefer to take the router and plate out when changing bits. It greatly simplified when the router is laying on it's side and you can adjust it easier to get access to the collet nut and either get the second wrench in or hold the column lock in place. As nlong as your plate fits snugly in the recess on the top you don't need to screw it down. Gravity works for that too.
I think it's MCLS that sells some, but maybe Rockler and Grizzley do as well. They would be geared for using with a router if it came from them. I've heard that they can't be used with soft start but if you have no speed control then you probably don't have that either.
I much prefer to take the router and plate out when changing bits. It greatly simplified when the router is laying on it's side and you can adjust it easier to get access to the collet nut and either get the second wrench in or hold the column lock in place. As nlong as your plate fits snugly in the recess on the top you don't need to screw it down. Gravity works for that too.