For some bizarre reason you have to track the inbound QDM within 5 degrees on a non-precesion approach for the IRT, often this is done asymetrically as well just for a laugh! For best enjoyment do your IRT on a really buffety day with lots of windshear and enjoy the challenge of keeping that little needle within the tolerances.
On a simulation note I bought Jeppersen FlitePro which dissappointingly has no ADF dip. I recently contacted them and asked them if they were likely to include it on a later release, the answer NO!