I have one of the original TRA001 routers without the recently added above table winding thingie. To make bit changes, the shaft lifts completely out of the table and there's only the need for one spanner so no bruised knuckles.
From a design perspective, to raise or lower the bit you need to wind the handle on the right hand side (table mounted) so make sure you have access from there. To change bits, the on/off switch needs to be tapped and this needs access from the left side, so again make allowances in your design for this.
Just remember to remove the spring unless you intend using the router for hand held use as well (not recommended).