4 PDF pattern for Swanson seat extender/Brainbox adapter.
5 3/24/07 extender matches the Brainbox
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10 9/30/05 15° torso angle & good neck support.
11 Old setup w/ M5 medium seat and extension.
12 10/3/05 medium M5 seat w/ extension & headrest carved from Power On Cycling foam.
13 Extender was cut to match Brainbox 700 bag. Rubber edge trim came with Brainbox
14 .049" 6061-T6 extension. Just the right flex/stiffness. Plate + hardware 5 oz. Could drill some holes to lighten or shave a few oz. with carbon.
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16 Too scratchy to use bare. Covered with Microfiber car wash cloth.
17 I sewed nylon tape along edges and connected with black 3/8" elastic.
18 Looks a little bit like an airline seat
19 Comfortable but not cushy. Next time I'll make the head rest movable with Velcro since I have to move the entire seat pad back and forth to adjust it.
20 Top 2" was cut off of original pad and 2, 3" thick blocks were glued on and carved with a very sharp paring knife
21 Glue is Amazing Goop Marine Shoe Goo works just as well but lacks UV inhibitors
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26 Note the seat hole reinforcing plates bonded to the seat bed. This is an old picture. I'm using the inner set of holes in the plates due to the low angle.
27 Seat cup filler carved from 3/4" high density PE foam. Helps rider change his position and avoid hamstring contact with the front edge of seat.
