[Nemo]

For a WCD Versachassis, I get a cost of $310.

$40: 2x Versachassis Rail @ $20
$20: 1x Versachassis gusset 8 pack
$150: 6x Versablock kit @$25
$40: 8x 1/2" hex bearing @$5
$20: 4x Versablock Cam @$5
$40: 4x Versachassis hex shaft @$10

Here's what I come up with for a 3 CIM ball shifter, 6 CIM, WCD drive base with 4" traction wheels/tires:

$40: 2x Versachassis Rail @ $20
$20: 1x Versachassis gusset 8 pack
$150: 6x Versablock kit @$25
$40: 8x 1/2" hex bearing @$5
$20: 4x Versablock Cam @$5
$40: 4x Versachassis hex shaft @$10
$480: 2x 3 CIM Ball Shifter @$240 w/ cylinder @$240
$42: 3x 12T CIM Gear @$7
$56: 8x #18T sprocket @$7
$84: 6x 4" Traction Wheel @$14
$30: 6x 4" Traction Tire@$5 per 0.5" 2 pack
$10: #25 chain
$150: 6x CIM Motor @$25

Total: $1162

I view that as an expensive drive base. I'm trying to figure out if our team can stomach the cost of that drive base (x2 with practice robot). That's $2300 without even talking about the costs to build manipulators.

If I remember right, last year's kit bot was worth between $500 and $600 if you bought all of the components.

Going with a West Coast Products single speed West Coast Drive gearbox instead of a 3 speed ballshifter would reduce the cost by $260 (gearbox is $110 vs $240). If we can use last year's ball shifters (similar to what Adam Heard posted for their WCD setup last year) and then buy only one set of regular ball shifters this year, that would reduce the cost significantly while maintaining 2 speed capability.

The existence of this excellent, albeit somewhat expensive "kit" drive base is going to create some interesting discussions.