As I recall, you had the opportunity to fit bigger / less flexi-flier / modern forks, & decided not to bother. I thought Schmidtty was a 'Cruiser'. What has caused the concern now? It's a never ending chase your tail thing. Better forks, stiffer frame, less weight etc.
My '91 R100GS thread is here
My Ride photos are here
It's just better when there's twins involved....