Full Belts discussion

I got a neosteel arch hip belt last year. I have made all adjustments recommended and also lengthened the wire one inch, which greatly helped.I have tried several times to wear the belt for more than a day without removal, but after taking off the belt I always have bright red marks on the hip that are very sore. Also the area of the belt in which the wire meets the crotch shield causes a lot of pain on my skin after about 24 hours and creates almost a welt like chafing of the skin. Also at the base of the penis on the top side closet to the belly button is very sore and red. Is this because my belt does not fit? I am very thin and I don’t have much body fat, so could I simply not be a good match for steel chastity? I would like to get to twenty-hour wear and would like to take whatever steps are necessary, but I don’t know where to go from here. Any advice you guys could give me would be greatly appreciated. - Ben