Rtk . .as in everything else in this hobby . .IT DEPENDS. . .

Consider this. .I usually run an external buss strip for power, and all the positive and negative leads for all the servos, as well as two leads for each receiver (redundant power) attach to these strips. . It's dirt simple, not too heavy, inexpensive as can be (about $3 for the strip, and another $25 in extensions for the servo wiring to plug into), ultra reliable, and capable of handling over 100 amps of current, or enough to fry a 14 gauge battery wire.

BUT, what it does NOT do is give me voltage regulation at a set level for more consistent operation of the servos and more accurate flying, "balance" two battery packs so that they discharge at the same rate for more even drain on the packs, filter and isolate each servos wiring from every other servos wiring, amplfy the position signal to the servo, give me an indication of the voltage levels left in the battery packs, or isolate any number of receivers from both eachother and the servos.

Now, these units were originally dsigned with Turbines ( and their horrible RF interference problems) in mind, to prevent interference feedback, and make things work better, as well as to ensure a regulated, filtered, and isolated voltage and signal for every servo in the plane. I've had instances with a "dumb" external power buss setup where one servo glitched bad enough to almost lockout the entire plane, all due to a bad amplifier. These units prevent that from happening. . they also isolate any shorts or other types of electrical glitches form getting back to the reeceivers.

I will never claim that these units are THE fix for whatever ails your planes radio system, but they do a lot of things to help out, and give your system every last chance possible to keep working properly. There are "ways" to do this without these units, but when you weigh the complexity of doing this, with the convenience these units offer, as well as the tremendous boost in consistency and safety they provide, I'd say they would be an accepted "PLUS" for any installation. I wouldn't be looking them over and evaluating them if I thought they were going to give less than optimal results to my testing. And I surely would not buy one if I thought it had no promise. So, I'm gonna look them over. . very well, and give as impartial a report as possible. . some people may not like the results of what I find. . others will, no doubt, be very pleased. But, after all, this is only a hobby, and these units are just another facet in that hobby.

What people will always have to remember is that these units will NOT solve their problems for them, and there is no substitute for a properly laid out and prepared basic installation of radio gear. These units will help with consistency, safety, and with the longevity of stressed parts, such as servos, and in the long run may prove to be very beneficial. Time will tell.