<PAGE>
Exhibit 7.3
June 28, 2000
Arthur Andersen LLP
355-4/th/ Avenue SW
Suite 2100
Calgary, Alberta T2P OJ1
Attn: Blair R. Kraus, C.A.
Dear Sir/Madam:
This letter constitutes notification that Energy Exploration Technologies is
engaging Arthur Andersen LLP as its new independent auditors in accordance with
your proposal, effective immediately.
Enclosed herewith for your review please find a form 8-K that we intend to file
with the Securities and Exchange Commission. Item 4(a)(2) of the form 8-K
contains certain disclosures relating to your engagement as required under Rule
304 of Regulation S-X. We hereby request that Arthur Andersen furnish NXT with
a letter addressed to the Securities and Exchange Commission, which we will file
as an exhibit with the form 8-K, stating whether it agrees with the statements
contained in item 4(a)(2) of the form 8-K and, if not, stating the respects in
which you disagree.
We thank you in advance for your cooperation in responding to the foregoing
request.
Very truly yours,
/s/ John M. Woodbury, Jr.
John M. Woodbury, Jr.
Chief Financial Officer & General Counsel
