As much as I dislike the colored bumpers from an aesthetics perspective, I have to agree with others that they are far and away the easiest way to be able to keep track of which alliance a robot is on. My only complaint is that some colors "just don't look right" on some robots

Watching Bomb Squad play last weekend with red bumpers just does not seem right....
For the last several years my teams have utilized either Velcro or snap fasteners similar to
http://www.joann.com/dritz-heavy-dut...-kit/prd34426/ with the base portion screwed into the edge of the plywood. Both have worked great, and we only have to take the bumpers off once for inspection. I keep pushing for us to build a set of "show covers" with the team name on them instead of the numbers, since black looks much nicer on our robot than either red or blue.
The one set of bumpers with alternate color cover makes it so much easier to change colors in a hurry, for example between semi-finals and finals.
__________________
Team 5148 - 2014 Wisconsin Regional Rookie All-Stars!!
Mentor: 1379: 2004-2008 / 2530: 2008-2013 / 2861: 2009 / 5148: 2014-??
Lead Robot Inspector: 10,000 Lakes '09 - '11 / Lake Superior '11-'12 / Northern Lights '13, '15 - '16 / Championship '09 - '12, '14 - '15
Attending/Inspecting 2017: TBD, Wisconsin, STL Championship
"Sometimes the questions are complicated and the answers are simple" -Dr. Seuss