RB751G-2HnD - Single radio repeater?

I’m a little confused with the info in the wiki and unfortunately don’t have a device on-hand to test various configurations with.

I’m trying to extend the range of an existing wireless AP/Router. Based on the information I’ve read I should be able to accomplish this by using the device in ap-bridge mode along with wds?
I’m also prepared to replace the existing router with a mikrotik device if needed for compatibility purposes.

Could anyone confirm this and/or perhaps offer some advice?
I know the best way to do this is to use 2 devices with 2 radios in each but I’m trying to avoid that avenue at the moment due to it’s cost.

This is correct.

It would also be best to replace the original because sometimes WDS between different OS’s does not play nice.