Hello I am equipped with a Humminbird Solix not the same transducers but it is the same principle:
mounting glued tranducers is very practical, especially at high speed, there is no risk of tearing it off!
On the other hand, especially for 2D chirps probes, they must be in the water at the risk of destroying them by heating!
Another consideration to be taken into account in order to have a correct depth is to have the tranducer very horizontal in navigation, which is more difficult to achieve by gluing.
For the adjustment, we draw a line on a wide strip of sctocht on the console with a level during a test, this line will serve as a reference for the installation of the tranducer.
The SIDE and the like will not work correctly in glued assembly!
For the DI to be tested but there will be a loss just like in 2D but more important (reduction of the max depth)
There are through probes rather reserved for slow boats, on fast hulls there have been accidents due to the outgrowth under the hull, be careful!
On my, XSRIBS I mounted the transducers on the board after selecting the position by photo with plates permitting a fine adjustment of 2 cm of the height without having to make additional holes.
sorry for my english I'm French!