A few years ago, I made up a stand alone steam source for orphaned engines. I used the 3" diameter boiler with 660 W Hotwatt heater repurposed from a Jensen 95G. Same boiler and heater is used for the 55.
My experience is that the stand alone boiler will power most anything I hook it to EXCEPT turbines...there is just not enough steam volume in my opinion to power the turbine from a 95G...reason I cannibalized the 95G in the first place. I think you would be happy with hooking most anything else to it except a turbine as turbines are steam hogs and honestly the 3" boiler with Hotwatt heater just isn't up to that task.
Roger