Careful with "older hitch". Many years ago I found an entire hitch set up at a junk store. Bars were not marked with any markings. Turned out later that bars were 1400 pound. Way to big for our 20 foot trailer at 3,500 pounds. Showed the set up to couple rv places. All said, I could bend metal on the "A" frame because of to much stress.
Is there any markings on the bars? If you could find out the size of bars you might have better idea if they are alright to use for your set up.
should I invest in newer technology?
I won't answer that...I'm using a brake controller that we got for our 1984 trailer. Still works as designed (conducts elec to brakes). But I do have a new Prodigy behind the seat, just in case.
2003 Majestic 23P... Northwest travel machine
2013 Arctic Fox 25W... Wife "doll house" for longer snowbird trips
2001 "The Mighty Dodge"... tow vehicle for "doll house"