Dee Snaffle Bit

so, i'd like to switch my horse from his D ring to a loose ring
and a regular snaffle, to a french link.. (all happy mouth, by the way)

before i bought him he had a dr (something, i can't remember! but it looks like french link except that the "link" is tilted back to be more severe)

so i want to go from

http://www.doversaddlery.com/happy-mouth-jointed-king-dee-horse-bit/p/X1-01672/cn/1464/

to

http://www.doversaddlery.com/happy-mouth-french-link-loose-ring-bit/p/X1-010418/cn/1464/

i'm switching because i know i don't NEED a bit to ride him, so i'd like to use the least severe bit i can..
how do you think hes going to take it?
i event with a focus on dressage, so most our time is spent "on the bit"
he doesn't do anything really, he bends and accepts pressure well. I rarely use my hands for anything other then collection, so i just need a bit to be "in his mouth" so he has the softest thing possible to listen to me..

and i'm not heavy handed, nor is he hard mouthed.