New to bashing locos.

Am in the process of back dating my 4-4-0.  I've already taken the engine apart and have mocked up the fluted steam and sand domes as well a diamond stack and funnel stack (need to see which stack looks best).  I bought a fancy headlamp bracket to extend the lamp over the front beam after I shorten the smoke box. 

I need to remove the head lamp / bracket from the smoke box - are there any tips or tricks to removing the stock lamp.

Thank you.

Walt Newman