R2: Only one (1) Robot will be allowed to participate per Team in the VEX IQ Challenge. ... If you are swapping out an entire subsystem of either item 1 or 2, you have now created a second Robot and are no longer legal.
In QA473, the GDC ruled that replacing a Robot's wheels after inspection would be considered a violation of R2 because the team is replacing parts of Subsystem 1. Based on my reading of the rule, a team doing so would not be violating R2 because no swapping of "an entire subsystem" took place. Subsystem 1 includes the entire robot base, specifically the structural components, none of which would be replaced. Furthermore, "swapping" a subsystem implies that two distinct subsystems exist, which did not occur in QA473.
A robot consists of both Subsystem 1 and Subsystem 2. Even if a team swaps an entire assembly of Subsystem 1 or Subsystem 2, they may not have yet created a second robot if no separate Subsystem 1/2 exists. In the blue box, it is written that "If you can place two complete and legal Robots on a table next to each other, then they are two separate Robots." In this case, there would not be two separate robots, because only parts of a single subsystem are being replaced. A common-sensical reading of R2 would lead me to believe that these are not two separate robots, and thus not a violation of R2. It is also written that "trying to decide if changing a pin, a wheel, or a motor constitutes a separate Robot is missing the intent and spirit of this rule" - it is specifically this statement that implies that changing a wheel would not be considered a second robot, and thus not a violation of R2.
I have three questions:
- Are five wheels considered to be an "entire" assembly of Subsystem 1, as appears to be implied by QA473.
- Is modifying parts of Subsystem 1 or 2 during a competition a violation of R2.
- If modifying parts of Subsystem 1 or 2 is legal, how much modification is allowed? It is clear that a full replacement (especially with a prebuilt assembly) runs counter to the intention of R2.