Understanding props and transforms

I'm trying to put into practice what I saw in Michael Wilde's Regex video with regards to making rex searches persistent. I must be missing something because I'm not getting the results I'm after.

(with help from many folks here) I've built a search regex like so. It works perfectly from search:

^(?:\S*\s*){5}(?<hostname>\S*)[^%]*(?<alert>%\S+)

Now, I'm trying to make it persistent by adding those search elements to /local copies of props.conf and transforms.conf.

Since this syslog search is geared mostly towards Cisco syslog output, I see that there is a cisco_syslog stanza in props.conf that I think I can use:

[cisco_syslog]
MAX_TIMESTAMP_LOOKAHEAD = 32
SHOULD_LINEMERGE = False
TIME_FORMAT = %b %d %H:%M:%S
TRANSFORMS = syslog-host
REPORT-syslog = syslog-extractions

I copy the entry from default/props.conf and add it to local/props.conf and add the changes:

[cisco_syslog]
MAX_TIMESTAMP_LOOKAHEAD = 32
SHOULD_LINEMERGE = False
TIME_FORMAT = %b %d %H:%M:%S
TRANSFORMS = syslog-host
REPORT-syslog = syslog-extractions,syslog-cisco

I add the corresponding stanza to local/transforms.conf:

[syslog-cisco]
REGEX = ^(?:\S*\s*){5}(?<hostname>\S*)[^%]*(?<alert>%\S+)
FORMAT = hostname::$1 alert::$2

Issue the | kv reload=true and change my search sourcetype=syslog, which I'd expect to at least show the new fields in the field picker, but alas, it does not.

Can anyone point me to what I might have missed?

With gratitude, L:x