New poster - Questions about KEF drivers

New poster here though I've been a lurker for yearks.

I ran into a very good deal on both KEF Q800DS and R800DS. I've incorporated some of them in my surround system but I'd like to use the other drivers to make non-dipole speakers, similar to the KEF R8 speakers.

However, after some research I've come to find out that the drivers used in these units vary a bit from the LS50 and Q150s in that the MF/LF driver is 8ohm while the tweeter is 4ohm.

Will I be able to build a crossover to make these work properly? I'd be trying to get 4ohm (nominal) tweeters to work with 8ohm woofers.