My takemy take as it unfolds U-7 to be tested - great does it end there? if it does then I'd think the up side is limited because they stated in Nov 16ths release. U-8 -u-9 and u-9.5 will not be tested at this time. So the U4 is the big?. as they have not received the final processing logs.
Oct.22nd news release states if either u9.5 or u.4 are successful then this could result in considerable increase in Mira's previous resource or reserve assessment. So that leaves U4 possibley to add more to it along with U7 Well SEE