The T11 has a quick-release cam system available as an accessory. It is pre-fitted to their aluminium router table, I think, which has an aperture, but not a removable plate. It's just three cams that catch up the baseplate, located by semicircular indents around the sides of the plate. I thought the system would be a good idea when I got the T11, so I bought it and it's fitted to my router insert plate presently.
I got the plate I'm currently using professionally drilled by a local machine shop, to drawings I made up from the info that Trend supply with the router. I got them to do two sets of holes, for the cams and for the usual M5 mounting machine screws (which are inboard).
There are three cams, equally spaced round the rim of the baseplate. The M5 screws, OTOH, are
not on an equilateral triangle, I think because one of the fence/trammel rods gets in the way on t'other side of the baseplate.
Various things: The cam system isn't wonderfully well engineered, but it serves. Because my mounting plate is drilled to tight tolerances, there is no movement, but the locking doesn't feel very positive and you have to be careful to ensure the cams are in their locked position - it's hard to do this by feel. Also the security of the attachment is very much dependent on having the cams in an exact equilateral triangle centred on the router plate aperture. I don't know for certain, but I think any slack would greatly reduce the strength of the attachment. Mine are snug and tight (because I got a professional to drill the holes?)
If you didn't use an easily-removable plate, the cams would probably be very helpful, because it
is easy to mount the router with them. I can get the router properly located and held by the cams, and then put the M5 countersunk screws in to really hold it tight, but their intended use is to be the only mounting necessary. I think if I was using big cutters all the time, for example I have a hefty panel-raiser, I wouldn't be comfortable with just the cams. Also, the countersunk screws centre the shaft in the middle of the aperture pretty exactly, but I'm not sure the cams would.
Anyway I would consider them again if I wasn't using an easily removable router plate. As I write, I presently have a new plate (Incra, from Peter Sefton's Woodworkers' Workshop) waiting to be fitted into a new tabletop (the opening is a different shape, grrr!), and that isn't drilled for the cams. I'm not sure presently if I'll use them again or not.
It's worth pointing out that when using a big table-router handheld, the router plate from the table makes a jolly useful auxiliary base, if you need one. So even when I do use the T11 handheld, sometimes it doesn't come off the plate at all