many manufactures include awful brackets in their low end detectors. Have a look at the higher end that dont. All proper gear does not include a 'bracket'
im assuming you have the cable the wrong side of the coving and think you need a ceiling bracket?
i can say ive only used them in 20 yrs of install 20 times tops and never for that reason
it is protecting you and yours, why people want to keep old stuff going when well past it is beyond me
btw ive got a 20 yr old rape alarm for sale, mostly works.....
Have a look at the Siemens eline or Optex. Sia uses the spine now for everything. I understand Mr h point of using 7550 in factory etc but we don't use them for everything now apart from kings range