Yes, or trade it for a different brand - when I used to supply the PDM60 version of my keyless, I had a couple of guys wire up airhorn and it was within the 18A spec with the Stebel (
@1olbull's comes to mind as one and I tested that myself after re-wiring it last year - Steve might confirm this in case my old-timer's disease is affecting my recollection
)
I no longer do a kit utilizing the PDM60 - my current KeyLess already has its own solid-state switches for the key-switch replacement integrated into the kit; so your PDM60 would have exactly same functionality as it does now, with the key.
Before, with my PDM60-KeyLess variant I used three of the PDM circuits to switch those previously directed through the key leaving three as accessories
Now, whether with my current Key-Less or std key-switch, you will have all 6 circuits of the PDM60 still available to you.
I can't provide that older version as no longer produce that control board.
I can still quote you if you like, but it will be for my current version with the integrated switches. (see my signature link)