This is the reply that I got back from Mangowalk when I sent them a message this evening about the length of the stud being too short for the T4R replacement antenna. I had ordered the 5" antenna (most of you have ordered the 3" one, I think) and it should arrive tomorrow. I had hoped that they might be able to supply a longer stud, if mine was not long enough!
"Thank you for contacting Mangowalk Customer Service.
The antenna mast included 4 studs, but we don't have anything longer
than those.
We saw that post lately and we don't know how he, fins, made it works.
Did he make his own studs? Maybe it's better if we can ask him for an
answer."
So, we need to hear back from fins or anyone who has figured this out!