Instead of a space elevator I would like the thoughts on a well. Create a structure from Geo orbit to a altitude where a the atmosphere is thick enough to harvest . Pump the gases to a altitude where it is most practical to processing the gases for shipping. I would like to think of spinning the structure with arms out stretched at different altitudes and lengths for mutable reasons. Fo gravity, momentum launch platforms. Could a arm be long enough spin at a speed at a altitude to mach orbital speed to permit docking or would the only practical lengths and speeds be so high docking at Geo orbit be the most practical and travel down the structure to work plate forms. Would we still have to wait for carbon nanotube fiber as strong as we need for a elevator or reaching not so far in to the gravity well save enough stress could we start earlier?