I participated in some of those campaigns and I offered my thoughts on the the ups and downs of participation with Helen. I note that in her comments in the paper that one of the most difficult part of the campaigns was the organising the submitiion of data/images by observers. There needs to be a central website to upload data to that is easy to use. Too many sites and convoluted upload instructions and requirements will result in observers not being able or inclined to submit data/images. In my opinion the data collection needs to be streamlined, be simple, and run by one central body. Your mention of the next "Comet of the Century" to take these observing campaigns to the next level requires thta we have advanced warning of the appearance of this bright comet. This was possible with Halley,Deep Impact,ISON and 46P etc. With PanSTARRS and other surveys discovering incoming comets in ever more distant circumstances, it should be possible to give advanced warning of arrival and create the opportunity to organise future campaigns. However there are other comets whcih we do not have that advanced warning for, such as C/2020F3 NOEWISE and C/2019 Y4 ATLAS which either arrived without warning or suprised us by exhibiting very unusual and spectacular activity.In both these cases there was intense observational coverage by amateurs that was untertaken individually and was not part of any coordinated observing campaign.Perhaps there should be a central body where observations of any comet could be lodged. The observational requirements could be laid out in a manner that would encourage observers to participate and submit data/images (including spectroscopy)and also enable researchers to analyse these observations.There will always be comets around for us to observe, if we can coooperate and collate observations then no doubt we will learn more about these fascinating solar system bodies. Just some of my thoughts for what they are worth.

Denis Buczynski