Fork upgrade

I've recently upgraded the forks on my Cannondale. Removed the Suntour XCT and upgrade to some RockShox Reba RL's.
The RockShox were secondhand and were cut a bit short. However, managed to fit them by removing the spaces from the headset. It's tight but it does fit although the guys that fit them said another 4mm/5mm would have been ideal.
Ultimately, I've got to be a little bit careful before I start putting the bike through it's paces, but wondered if anyone had any experience in this area or can advise if I am storing up trouble.
Many thanks
The RockShox were secondhand and were cut a bit short. However, managed to fit them by removing the spaces from the headset. It's tight but it does fit although the guys that fit them said another 4mm/5mm would have been ideal.
Ultimately, I've got to be a little bit careful before I start putting the bike through it's paces, but wondered if anyone had any experience in this area or can advise if I am storing up trouble.
Many thanks
Cannondale Trail 27.5 | 2015
Titus El Chulo 27.5 | 2017
Trek Slash 9 27.5 | 2015 (building)
Titus El Chulo 27.5 | 2017
Trek Slash 9 27.5 | 2015 (building)
0
Posts
Lower stack headset, no spacers or a stem with a shorter stack height can all be used to help.
I was trying to work out whether there is actually any detriment to the setup or ride because it "could" ideally be longer.
Titus El Chulo 27.5 | 2017
Trek Slash 9 27.5 | 2015 (building)