Market Harborough or Harbridge training aid??

[trefnantblackknight]

I posted another post the other day about changing my horses bit, he's currently in a pelham but has gone off it...so i was thinking of maybe riding him in his loose ring french link snaffle with a lozenge - the bit i backed him in - and one of these aids, i already have a harbridge and he gets on well with it but i like the market harborough what are the pro's and con's for both

i don't really use gadgets much i only have the harbridge because i needed something to show him where his head needed to go but barley use it nowadays. So i'm not too good on all the tech info

Thanks in advance x