You should be able to carefully fit the new etched plates over the existing ones. As for the small deflectors I have a spare set in my bits box but it just as easy to cut from brass shim.
Removing numbers. Can be a bit tricky - It depends on the loco but I have used meths carfully rubbed on with a cotton bud. If you are very careful you can use a glass fibre pen. Tee Cut is also good for removing such detail.
Removing numbers. Can be a bit tricky - It depends on the loco but I have used meths carfully rubbed on with a cotton bud. If you are very careful you can use a glass fibre pen. Tee Cut is also good for removing such detail.