I have had three kilts that have ended up being just a tad too loose after losing some weight and have worn each with braces/suspenders during the weight transition period and thereafter as needed, but purchased subsequent kilts in appropriate size to fit the newer size me. I used tartan suspenders/braces with clam style attachments and it can be tough to get them to hold two layers of wiastband with heavyweight 16 oz tartan, but can be done. My braces/suspenders are of the non-elastic variety, except for a couple 6 inch sections in the back to allow for minimal stretch, so are not prone to pulling back up from the originally set height, except when bending over they may caus some drift upwards over my hunched over torso temporarily. Call John at Keltoi as he offers an option for including buttons on the inside of the kilt to accomodate the button variety of braces/suspenders being worn with your kilt when ordered from him. My Kingussie build has them but luckily I have not had to use them. I do wear a belt with my suspenders/braces nearly always--originally it was because I needed some place to hang my sporran hangers from---sporran hangers being necessitated by the same reason the suspenders/braces were, namely a sizeable gut and unsizeable butt, relatively speaking, = no identifiable waist or even an inverted one with the wiast measurement greater than the hip measurement (yes it happens). But after an inital wearing or two I decided that if wearing both braces/suspenders and a belt I needed to cover the contraption with either a sweater or a waistcoat/vest and jacket. I did just this very thing a couple weeks ago at the Stone Mountain games with none aware other than myself and my wife who saw me getting dressed and later undressed (and maybe the one guy in the public restroom who saw me readjusting things after relieving myself in the non-standing way). I found over time however that hanging heavy things from my belt tended to drag it south and under my gut which, much like the gentleman in the picture, could become unfortunately comical, so have shifted away from sporran hangers to a sporran strap for all but the most formal affairs, where I tend toward the belt and suspenders and sporran hanger rig due to the kilt I typicall would wear to those events being one of my remaining loose fits.

My father wears both belt and suspenders/braces with pants frequently---one holding the pants securely up and the other holding the gut somewhat securely in (to support the back)--and IMHO it does not appear that bizarre or unusual, but then he lives in West Virginia where bizarre and unusual can be the norm.

Hasn't anyone here heard of a basic principle of engineering/design called the "belt and suspenders" approach to life? That principle is based on the premise that when there are two different and non-conflicting methods of support available, it may be advisable to use both so that either one is less likely as a solo means of support to fail---a built in up front fail-safe design.