Doing well H. A little tip though - take out the top turret and put it somewhere safe, then mask the opening where it fits. You'll find it a lot easier when you come to paint the model. Apart from not getting in the way, it'll also avoid breaking off the guns when handling.( It's a bit late now, but the same could have been done with the waist windows and guns - leave them off, mask the openings, and fit them when the model is virtually complete. )
The top turret should turn and lift out, and can easily be put back in place later - I know, I've done it many times on my B17 !!