Hello. This is my first post here, so go easy on me

. I have a 3/4 double bass (a Siko Suzuki model 1969 from reading the sticker on the inside), and want to get a pickup for it. I've been considering a K&K Bass Max or a Revolution Solo II after reading reviews and whatnot. The only hindrance is my father (who really owns the bass since he inherited it) who is worried that if I have to file down the bridge a bit to make the pickup fit, it could potentially do some damage and we'd have to buy another bridge and have it installed etc.
So my question is: is there reason to worry about doing harm to the bass with a slight modification such as this one, and if damage is done to the bridge how much does a basic one cost and do I have to spend the money to get it put on by a professional? I've put my own strings on the bass before and adjusted the bridge slightly for it, so I'm a little knowledgeable.
Thanks for your time.