When Mark did some prints over a week ago we clearly saw that a hotbed and fiddling with parameters (temp, fan AND other) brings a lot of change to the better quickly
BUT: Luck had it that the printed part was the belt drive wheel for a reprap, quite solid at the base - then the cogs for the belt and a rim. All went well up to the rim where it simply fell apart, because the cog section is less of a heat sink than the more solid base. It was an unusually cool day with a breeze here and there coming through the garage door. Just perfect!

From other tests Mark ran before he concluded a hood & temp control would fix-a-lot and I'm absolutely sure that's right. I don't know any industrial 3D application that doesn't run under a hood and fans for circulation.

six-pack of heaters w thermostats at $17 per unit  hoods of cardboard glued in several layers to keep the heat in or styrofoam, and a reasonable perspex window. If the heating is put on early and onto 40 or 50deg Celsius which is still 100 deg under the material melting point and a second fan from a comp housing is kept running all the time there won't be any need for a heated pad.

btw. sun going down and 100s of people (100W heaters each) leaving a building at 5pm turns a nice warm office into a freezer compartment until the aircon system realises that it has to deal with quite a temp drop.

W