I like that the Rostock and rs1.2 on my 223 are an exact match for my bigger gun in terms of training. But it also feels way to substantial on a 223. I feel like a Rostock lite and a much lighter scope like the swfa 3-9 would be a better set up if the 223 is a user not a trainer. Though I am leaning toward adding another 223 vs reconfiguring this one, will have to see once the lites come out.
I also started with all the spacers in and settled on 1 being the best fit for me if shooting a combo of sitting, prone, and standing. Im using UM lows on mine.