Originally Posted by Skiddins
There is also the issue that when running on carpet, the chassis can catch on the carpet during a turn.
By smoothing the edges the the chassis won't try to 'dig in' when rubbing on the carpet, causing handling issues.
I smooth out every single 'edge' on the underside so that they all feel smooth with no sharp edges when I run my hand along the underside of the chassis.
+1 to that. And I also make sure I radius the edge where the battery tape fits, to minimise the chance of it cutting through the tape.
If I do seal the chassis with CA, then I put a drop on the chassis edge and spread it along with a cotton bud (Q-Tip?) until it won't spread any further, then repeat until its done.
On older chassis, such as early 90's, you used to see a yellow strand in the carbon. This was a Kevlar thread and was used for alignment purposes during the layup. Kevlar liked to absorb water, which would then lead to delamition. So sealing would have been important.
We don't see the kevlar strand any more as it has been discontinued due to component failures in the aerospace industry as a result of the water ingress.