Yes, that will work great.
A lot of people use these, even with smaller wattage bed heaters than the ones we have on the FT-5's, and for exactly the same reasons.
As long as you can find a place to mount it where it can get some airflow across the heat sink, it should be excellent.
I used this one myself and it fit inside the enclosure perfectly once I moved the control board down and to the left (which is a good idea anyway for a number of reasons)-
The mosfet on the controller board may indeed be rated for 30 amps, but the connector isn't.
The connector is rated for around 18 amps maximum.
Unfortunately the bed heater (12 volt version) draws 23.5 amps (and even more if you run the supply above 12 volts).
This is too close for comfort for the mosfet (which is not heat sinked all that well by the way), and definitely over the top excessive for the connector.
So........ boards and connectors melt down or even go up in flames.
You can't go wrong with either the booster I used or the TriGorilla.
Pick which ever one strikes your fancy.
They will both do what needs to be done nicely.
I literally didn't even power mine up before adding the booster board because of all the verified horror stories on this subject and examination of the controller board (I am very familiar with the connectors they use).
Oh, and be very careful raising the PSU voltage.
You can easily exceed its output capacity with these heaters.
That will in turn cause shutdown and overheating issues, which then lead to other problems.
Although some people have been lucky boosting the voltage (I wasn't) it is best to run it at 12.0 volts.