The router is cheapie Energer 1200 that came, I think, either from Amazon or Screwfix. It's not specified as being possible to fit into a routing table - but I bought a router table insert from Aliexpress and have drilled the router base plate (and 2 new holes in the insert) to make it fit. I've then mounted the router in a home-built table made from oddments of 18mm plywood (pocket hole joints) with two T-tracks let into the top to provide clamping for the plywood fence and for hold-downs to clamp a featherboard or jig. The base of the table has the lift mechanism with the errant knob to wind it up and down - the plunge lock on the router is manual (i.e. not sprung) so it can be wound up and down to position and then locked with the lever.Not boring but it would be more helpful if you said what the brand of router is. Someone that has one may have already pulled the springs out and can tell you what they did. Also makes the thread more useful to someone else with the same problem next year.