The Explorer Q and Explorer 5 use the same Tail booms for fuselage.
It’s important to note that having common components can offer advantages and make the life of pilots easier.
Tails booms for Explrorer Q and Explorer 5   offered  as the following dimensions for Xail and Vtail

X Tail :
Regular tail boom : 95cm length
Long Tail boom :   105cm length

Vtail:
Regular tail boom :  101cm length
Long tail boom :      106cm length