Remap unused buttons to do manual tool release and rotate carousel (have ATC)

Traceback (most recent call last):
File "/usr/bin/qtvcp", line 555, in <module>
_qtvcp = QTVCP()
File "/usr/bin/qtvcp", line 261, in __init__
window.load_extension(opts.usermod)
File "/usr/lib/python3/dist-packages/qtvcp/qt_makegui.py", line 269, in load_extension
methods, self[obj].handler_module, self[obj].handler_instance = self._load_handlers([handlerpath], self.halcomp, self[obj])
File "/usr/lib/python3/dist-packages/qtvcp/qt_makegui.py", line 297, in _load_handlers
mod = __import__(basename)
File "/usr/share/qtvcp/screens/qtdragon_hd/qtdragon_hd_handler.py", line 20, in <module>
mod = importlib.import_module(module, PATH.SCREENDIR)
File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "/usr/share/qtvcp/screens/qtdragon_hd/qtdragon_hd_handler.py", line 22, in <module>
HandlerClass = mod.HandlerClass
AttributeError: module 'qtdragon_hd.qtdragon_hd_handler' has no attribute 'HandlerClass'

cam@linuxcnc-mill:/usr/share/qtvcp/screens/qtdragon_hd$ tail qtdragon_hd_handler.py
            self.w['btn_{}'.format(i)].setObjectName(i)
            self.w['btn_{}'.format(i)].setProperty('isManSensitive',True)
            self.w['btn_{}'.format(i)].hal_init(HAL_NAME=i)
            self.w['btn_{}'.format(i)].setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)
            self.w['btn_{}'.format(i)].setMinimumSize(66, 50)
            STATUS.connect('spindle-control-changed',  lambda w, num, state, speed, upto,obj= self.w['btn_{}'.format(i)]: obj.setEnabled(not state))
            self.w.horizontalLayout_40.addWidget(self.w['btn_{}'.format(i)] )
        self.w.btn_atc_release.setText('TOOL\nRELEASE')
        self.w.btn_atc_cw.setText('ATC\nCW')
        self.w.btn_atc_ccw.setText('ATC\nCCW')

And this the directory content

[code][code]cam@linuxcnc-mill:/usr/share/qtvcp/screens/qtdragon_hd$ ls -al
total 824
drwxr-xr-x  3 root root   4096 Feb 17 16:49 .
drwxr-xr-x 17 root root   4096 Sep 21 17:52 ..
-rw-r--r--  1 root root  12232 Feb  3 09:35 argentium.qss
-rw-r--r--  1 root root   9694 Feb  3 09:35 brushed_metal_color.qss
-rw-r--r--  1 root root  10086 Feb  3 09:35 dark_grey.qss
-rw-r--r--  1 root root   9210 Feb  3 09:35 dark.qss
drwxr-xr-x  3 root root   4096 Feb 10 19:50 images
-rw-r--r--  1 root root   4304 Feb  3 09:35 metal.qss
-rw-r--r--  1 root root   3625 Feb  3 09:35 qtdragon_hd_ABOUT
-rw-r--r--  1 cam  cam    2109 Feb 16 20:54 qtdragon_hd_handler.py
-rw-r--r--  1 root root   1758 Feb  3 09:35 qtdragon_hd.qrc
-rw-r--r--  1 root root  10653 Feb  3 09:35 qtdragon_hd.qss
-rw-r--r--  1 root root 743323 Feb  3 09:35 qtdragon_hd.ui
-rw-r--r--  1 root root    398 Feb  3 09:35 version.txt