I'm building pretty much the same kit for Tigerman's GB myself. So far other than losing the loader's hatch it's been a easy build. Only issue is half the parts in the box with mine are the typical Dragon 'parts not for use' so just check and double check to make sure you've got the right number on the part. I had several parts not want to fit and then noticed the wrong number and wrong sprue, my fault for just grabbing the ones that 'look right'.
There should be enough spare parts there to replace any of the grab handles, if not just drill the hole out and fold a small piece of wire and glue it in the instead- generally the wire will look better anyway and has no seam to clean up.