well you can do that, but the secret lab maps dont come up as often as petpet lab maps.
Unless of course, you dont really wanna use the lab ray, then I guess waiting for parts is okay.
Initially I managed to pick up a few of those which are the expensive ones i.e. 250k but I sold them away. Only decided to complete the map recently so I have to recollect them again. Wouldn't use it on my main pet but will try it on a newly created pet once I complete the map. What's worse is that the chances of it decreasing levels is higher than gaining level so in the end I still have to spend more money to level up my pet


