500N, My Dad told me a tale. If he belived everyone who claimed to have been on the balcony at the Iranian Embassy it would have collapsed under the weight!!
Lots of pics in the public domain of RAF
Js with DIRCM, LIRCM, FIRCM. MAWs, PAWS, SATCOM, SITCOM Even a J with Tanks (or are they tanks) those on the U2 were hollow to mount Antenna.
Do all the Block upgrades that were in the planning since the J entered service not provide some of these capabilities that render the platform suitable for SF so we can retire the Ks after great service. Long past their sell by date.