diff --git a/chunkie/@chunker/refine.m b/chunkie/@chunker/refine.m
index 03bbafb..f1ce045 100644
--- a/chunkie/@chunker/refine.m
+++ b/chunkie/@chunker/refine.m
@@ -150,9 +150,6 @@
 
                 chunklens(i) = sum(chnkr.wts(:,i));
                 chunklens(nch) = sum(chnkr.wts(:,nch));
-                
-                chunklens(i) = dot(dsdti,w);
-                chunklens(nch) = dot(dsdtnch,w);
 
                 ifdone=0;
 
diff --git a/chunkie/@chunker/upsample.m b/chunkie/@chunker/upsample.m
index 2c29616..5aeb177 100644
--- a/chunkie/@chunker/upsample.m
+++ b/chunkie/@chunker/upsample.m
@@ -42,10 +42,11 @@
 chnkrup.wts = weights(chnkrup);
 
 if chnkr.hasdata
-    ndata = chnkr.size(data,1);
+    ndata = size(chnkr.data,1);
     nndata = ndata*nch;
-    chnkrup.r = permute(reshape(upmat*reshape( ...
-        permute(chnkr.datastor,[2,1,3]),k,nndata),kup,ndata,nch),[2,1,3]);
+    chnkrup = chnkrup.makedatarows(ndata);
+    chnkrup.data = permute(reshape(upmat*reshape( ...
+        permute(chnkr.data,[2,1,3]),k,nndata),kup,ndata,nch),[2,1,3]);
 end
 
 if nargin > 2
diff --git a/chunkie/demo/demo_scatter.m b/chunkie/demo/demo_scatter.m
index 240383d..408fc3c 100644
--- a/chunkie/demo/demo_scatter.m
+++ b/chunkie/demo/demo_scatter.m
@@ -77,7 +77,7 @@
 
 %
 
-start = tic; in = chunkerinterior(chnkr,targets); t1 = toc(start);
+start = tic; in = chunkerinterior(chnkr,{xtarg,ytarg}); t1 = toc(start);
 out = ~in;
 
 fprintf('%5.2e s : time to find points in domain\n',t1)
diff --git a/chunkie/demo/demo_scatter_slit.m b/chunkie/demo/demo_scatter_slit.m
index cee33b2..4535aff 100644
--- a/chunkie/demo/demo_scatter_slit.m
+++ b/chunkie/demo/demo_scatter_slit.m
@@ -61,7 +61,7 @@
 
 % build CFIE
 
-fkern = @(s,t) chnk.helm2d.kern(zk,s,t,'C',1);
+fkern = kernel('helm','C',zk);
 
 start = tic; sysmat = chunkermat(chnkr,fkern);
 t1 = toc(start);
@@ -72,13 +72,13 @@
 
 % get the boundary data for a source located at the point above
 
-kerns = @(s,t) chnk.helm2d.kern(zk,s,t,'s');
+kerns = kernel('helm','s',zk);
 targs = chnkr.r; targs = reshape(targs,2,chnkr.k*chnkr.nch);
 targstau = tangents(chnkr); 
 targstau = reshape(targstau,2,chnkr.k*chnkr.nch);
 
 srcinfo = []; srcinfo.r = src0; targinfo = []; targinfo.r = targs;
-kernmats = kerns(srcinfo,targinfo);
+kernmats = kerns.eval(srcinfo,targinfo);
 ubdry = -kernmats*strengths;
 
 rhs = ubdry; rhs = rhs(:);
@@ -115,7 +115,7 @@
 fprintf('%5.2e s : time to evaluate kernel\n',t1)
 
 srcinfo = []; srcinfo.r = src0; targinfo = []; targinfo.r = targets(:,out);
-uin = kerns(srcinfo,targinfo)*strengths;
+uin = kerns.eval(srcinfo,targinfo)*strengths;
 utot = uscat(:)+uin(:);
 
 %