Help with gears, cassette and shifter.
Hi guys I have recently acquired a Claude butler mountain bike which has 9 rear sprockets, I needed a new derailleur so I bought a Shimano Deore M610 10 Speed rear mech, the bike has a gear shifter for only 7, so I’ve set the derailleur to the 7 I gears I want for now. My question is can I use a 10 speed shifter on my current configuration and would the shifter need to be shimano.? Even thought the derailleur is 10 speed the cassette is only 9 so I use the limit screws to restrict it to 9, would a 10 speed shifter cause me an issue. Hope this makes sense.