"You will find you are your own worst critic, unless you are competing in a pattern comp." - Heh, naw, I always think the judges were too generous...

OP, if you have a lot of speed on the 45 down line, can you make the loop larger? A larger loop will give you more time to establish the downline and place the roll. Be sure to remember to throttle back after you cross the top of the loop. There is really no need for throttle much above idle in a 45 down line.