I received my first LCD Topgun last night, and I must say that after an hour of configurations, the thing works damn near flawlessly.  Everything functions...except any sort of reloading.  Maybe there is a MAME configuration that I have missed, but I cannot reload in ANY MAME game.  For the record, I am using the newest driver from EMS and NOT the gun2mouse driver or whatever it is.  Here is a list of things I have tried:
In MAME:
Enabled lightgun
Set lightgun device as lightgun
Enabled offscreen reloading
Calibrated lightgun (shooting the screen) so pointer is accurate
Set buttons in MAME for the gun
The games I tried were Lethal Enforcers and Revolution X.
Here are the problems I have had with each thus far.  Please note that both games were configured in their respective service menus.
Lethal Enforcers 
The cursor is 100% accurate and the shots are on target.  When it comes time to reload, however, nothing I can set or configure will reload the  

 guns!
Revolution X
The aiming cursor never leaves the upper left hand corner.  All fire buttons work correctly, but the cursor cannot be moved at all.
From what I can tell, this gun is badass, but something is missing in the configuration.  If anyone has experienced this before, pllleasseeeeee help me!
A couple more questions, as well.  Are there any lightgun games in MAME that will NOT work work with the Topgun?  If I set the calibration in the driver to the values in the wiki, would this improve anything?