Bows are a very personal thing. They make the connection between the player and the instrument and sometimes it's very hard to figure out what serves best. Clip-in frogs should be normal for pre-18th century music. And some bows one can't expect to buy of the rack. They are very special and need to be commissionedd like my bow for the lira da gamba, which is 101 cm long and enables me to hold cords a long time. That is nothing you find in a store.
Rainers bows I just love. They help me to get a brightness out of my large instruments I'm looking for. Large viols or basses so easily sound dull when the bow isn't able to activate the high overtones. With his bows I've never had that problem.