Can one rely exclusively on Adobe for Flex/Flash RSL's (to avoid using own bandwidth)?

If you have limited server resources and expect a lot of traffic to a Flash site, is there a way of NOT having to serve Run-Time Shared libraries, but rely on Adobe to do this for you?

For example, if you want to make sure "framework_4.0.0.14159.swz" is always fetched from "fpdownload.adobe.com" and not from your own server, what modifications should be made to the config section:

<runtime-shared-library-path>
    <path-element>/opt/flex4/frameworks/libs/framework.swc</path-element>
    <rsl-url>http://fpdownload.adobe.com/pub/swz/flex/4.0.0.14159/framework_4.0.0.14159.swz</rsl-url>
    <policy-file-url>http://fpdownload.adobe.com/pub/swz/crossdomain.xml</policy-file-url>
    <rsl-url>framework_4.0.0.14159.swz</rsl-url>
    <policy-file-url></policy-file-url>
</runtime-shared-library-path>
...
<static-link-runtime-shared-libraries>false</static-link-runtime-shared-libraries>

Also, is there any reason this might be a bad idea?

Please notice, I am using the command-line compiler, mxmlc.exe (not Flex Builder).

UPDATE: I guess my issue is more about the errors I get at run-time than the above question. In fact, the reason Flash tries to download from my server to begin with is that the Adobe download fails (see error messages in my comment). I am therefore going to accept the below answer and, if I don’t succeed in solving the proble开发者_运维知识库m, I might open up another question.

from Using the framework RSLs:

Note: You can point to the SWZ files that are hosted on the Adobe web site, rather than deploy your own SWZ files as RSLs. In this case, view the default entries for the RSLs in the flex-config.xml file to see how to link to them.

You can, but you never should - adobe.com does go down sometimes, or the client maybe allowed access to your site and not Adobe's (because of a corporate firewall, for instance).