[r9etb]

Cost it not an issue and all the relacement parts have already been built and paid for. Expensive junk if not used on Hubble.

Cost is an issue -- you said so yourself above, and you've said it again in this post.

[jpsb]

The mission has already been funded, and the equipment purchased. Cost is not a issue. Cost will become more and more of an issue as funding entitlements and paying interest on debt consume more federal dollars in the near future.