Adaptation of spacer on aerobar

[BeR]

Hello,

I ordered carbon aerobar on Aliexpress and spacers separately. I noticed that the spacers were not a perfect fit because there is a gap between the carbon and the spacer. Do you think this is dangerous since the contact point is not uniform?

[ejump0]

in my opinion, most force in aerobars are on fore-aft from pull n push on the bars for control. thus the bolt clamp.
however theres still need for sideway support, thus its recommended to fill that gap with some metal shim, at least on the top part of the 'n'. unless you install some kind of crossbar plate that connects both the armrest/aerobar