message: Update README.md
  Tubing was mislabeled
diff: @@ -75,7 +75,7 @@ You may also find other variations of the design meant for special testing/calib
  | 4 | 1 | McMaster-Carr | 91390A117 | 4.75 / 100 | [C][4mcmc] | M5x5mm set screw. Attaches rotor to stepper |
  | 5 | 3 | FastEddy | TFE4262 | 12.50 / 10 | [F][5fast] | 5x16x5 Metal shielded bearings |
  | 6 | 2 | McMaster-Carr | 5463K648 | 8.20 / 10 | [C][6mcmc] | 3/8"ID <-> 3/4"ID adapter **READ WARNING BELOW**|
  -| 7 | 6in/15cm | McMaster-Carr | 5894K38 | 12.30 / 2 ft| [C][7mcmc] | Continuous-Flex Soft Tygon PVC Tubing, 1/2" ID, 5/8" OD |
  +| 7 | 6in/15cm | McMaster-Carr | 5894K38 | 12.30 / 2 ft| [C][7mcmc] | Continuous-Flex Soft Tygon PVC Tubing, 3/8" ID, 5/8" OD |
  | 8 | 2 | McMaster-Carr | 9579K67 | 12.63 / 20 | [C][8mcmc] | Herbie clip E, 12-13.8mm, to clamp tubing to fittings |
  | 9 | 1 | Digikey | X-NUCLEO-IHM03A1 | 10.64 / each | [K][9key] [M][9mr] | Stepper driver dev board |
  | 10 | 1 | ST | X-NUCLEO-IHM02A1 | 15.00 / each | [S][10st] [R][10rs] | **ALT for item 10:** Two-axis stepper driver dev board |
  