revell f-106 delta dart/ beginner

hi, new to modeling, lots to learn. i was in the USAF back in 1970 stationed with f-106s in maine so i thought it would be neat to have a replica of the plane i worked on for display.purchased a 1/48 scale revell kit and things are just not progressing smoothly.  Canopy is wider than the fuselage. also need help with which glues to use.I love tenax r7,seems to have a strong bond. do you experienced modelers build an untire model with tenax??? which glue should i use to bond wheel struts to the wheel well that are going to support the weight of the model? also,why do i need to use fine sandpaper?, won't the paint fill in nicely and give a nice uniform appearance even if i use a coarse paper? i will be purchasing a 3rd f 106 and try again,if it doesn't come out decent i'll try a 1/72 scale same aircraft.