[Steve R]

Combi drill meaning an electric screwdriver with a hammer function? Better than an impact driver? I like torque 

Nlot specifically hammer but well worth having.  Just a drill you can use as a screwdriver and a drill.  They generally have 2 speeds/gears.  normally screw drive in low gear, drill in high gear. 

[Paul B]

I have a Bosch 18v combi drill/driver which when I tried to take down my board failed to take out the screws put in by my brother in law using his Ryhobi Impact driver.
I now have an impact driver as well.

Mine gets absoloutely crushed by PeeWees DeWalt of the same (ish) value. TBH, I'm not overly impressed with my Bosch 18v after owning it for a number of DIY projects (and I still need an impact driver).

[a dense loner]

I would love to see peewee and Paul B go head to head in a non-celebrity death match!

[peewee]

No need, given Paul's history he'll injure himself.

[a dense loner]

Damn, didn't factor that in! Quite right, he'd trip up and break a leg getting into the ring

[Fultonius]

Had to borrow an SDS drill a few times, and probably likely to need one in future so, considering getting another Makita 18V. Any thoughts on whether or not one like this would do ok for the odd bit of bolting?

https://www.screwfix.com/p/makita-dhr202z-2-9kg-18v-li-ion-lxt-cordless-sds-rotary-hammer-drill-bare/48570?tc=QT3&ds_kid=92700055256569560&ds_rl=1244066&gclid=Cj0KCQiAjKqABhDLARIsABbJrGl7RVvTLsVndQv0Lq83dG9G29kuC70eBxsMsRgM1aCwLuQZq8oSN2kaAvwWEALw_wcB&gclsrc=aw.ds#product_additional_details_container

[nik at work]

A bit of bolting no problem, probably not up to endless days as a workhorse though. Used one of these to bolt some routes on the Isle of Man in some seemingly very hard rock, it was slower going than with a big beast of a drill but managed fine.

[SamT]

The 202 is a bit old now, personally id go for the brushless DHR242...(I've got one).
I've done bolting using resin P bolts (so 16 and 18mm holes with it and its fine).  Very robust and certainly a fave of cavers. 

If you were doing full routes, on a regular basis, a 36v option (bosch GBH) would be better.

big topic with loads of info here.. https://ukcaving.com/board/index.php?topic=19468.msg249996#msg249996