Upgrading to Current from 15.0, quandaries regarding slackpkg+ and multilibs

Hello Folks,

I am in the process of upgrading from Slackware 15.0 to Current. Have slackpkg+ and multilib installed that then add an addition level potential issues. At first, I was receiving errors while doing islackpkg update gpgi and islackpkg updatei (errors related to checksum and sometimes it seemed to have failed to retrieve a file, etc).

Previously, I had changed the repositories to current but that did not stop the errors. So, did some research on the topic and edited islackpkgplus.confi, below is a snapshot of some relevant parts of that file:

===
# Enable (on) / Disable (off) slackpkg+
SLACKPKGPLUS=on

--
# Slackware 15.0 - x86_64
MIRRORPLUS['multilib']=https://slackware.nl/people/alien/multilib/current/
#MIRRORPLUS['alienbob']=https://slackware.nl/people/alien/sbrepos/15.0/x86_64
#MIRRORPLUS['restricted']=https://slackware.nl/people/alien/restricted_sbrepos/15.0/x86_64

# use this to keep the slackpkg+ package updated to the latest stable release
MIRRORPLUS['slackpkgplus']=https://slakfinder.org/slackpkg+15/

==> NOTE: the files on https://slakfinder.org/slackpkg+15/ are the same as the ones in current.
--

# Supported Repositories (see /usr/doc/slackpkg+-* for details and notes):
#
#slackpkgplus: *https://slakfinder.org/slackpkg+{dev,1.7,1.8,15}/
multilib: *****https://slackware.nl/people/alien/multilib/{15.0,current}/
#alienbob: *****https://slackware.nl/people/alien/sbrepos/{15.0,current}/{x86,x86_64}/
#restricted: ***https://slackware.nl/people/alien/restricted_sbrepos/{15.0,current}/{x86,x86_64}/

=======

After the changes highlighted above (basically MIRRORPLUS) there are no more errors echoed on the screen. But I was wondering if it is safe to proceed with the upgrade leaving slackpkgplus ON and using Multilibs. Any suggestions would be appreciated.