[4333bw (Brad)]

I have just purchased a Royal Astro 100mm f10 reflector on a wooden tripod. The telescope is well abused with very dirty mirrors. Both end plates are pop-rivetted to the tube which causes me some concern. The tube is about 955mm from end to end. Has this been shortened? The telescope won't come to focus on the moon with the 6mm eyepiece but does with the 12mm eyepiece. To remove the mirror I can drill out the rivets but if I replace them with bolts and nuts the nuts appear to just tighten against the inside of the tube, is this normal? I would need long arms to hold the nuts to tighten them.
I did take some photos but attaching them seems to be beyond my abilities.
This is my first reflector so any help would be greatly appreciated. Brad.