diff --git a/madx/lib/beta_beat.macros.madx b/madx/lib/beta_beat.macros.madx
index 3937a4b4..90de97f0 100644
--- a/madx/lib/beta_beat.macros.madx
+++ b/madx/lib/beta_beat.macros.madx
@@ -8,7 +8,7 @@
 select_monitors(): macro = {
     select, flag=twiss, clear;
     select, flag=twiss, pattern="^BPM.*B[12]$", column=name, s, betx, alfx, bety, alfy, 
-                                              mux, muy, dx, dy, dpx, dpy, x, y,
+                                              mux, muy, dx, dy, dpx, dpy, x, y, px, py,
                                               k1l, k1sl, k2l, k3l, k4l, wx, wy, phix,
                                               phiy, dmux, dmuy, keyword, dbx, dby,
                                               r11, r12, r21, r22;
@@ -21,7 +21,7 @@ select_monitors(): macro = {
 select_elements(): macro = {
     select, flag=twiss, clear;
     select, flag=twiss, class=monitor, column=name, s, betx, alfx, bety, alfy, 
-                                              mux, muy, dx, dy, dpx, dpy, x, y,
+                                              mux, muy, dx, dy, dpx, dpy, x, y, px, py,
                                               k1l, k1sl, k2l, k3l, k4l, wx, wy, phix,
                                               phiy, dmux, dmuy, keyword, dbx, dby,
                                               r11, r12, r21, r22;
@@ -40,6 +40,16 @@ select_elements(): macro = {
     select, flag=twiss, class=drift;
 }
 
+/*
+* Selects the LHC IPs only and only important columns.
+*/
+select_lhc_ips_few_columns(): macro = {
+    select, flag=twiss, clear;
+    select, flag=twiss, pattern = "^IP[1-8]$", column=name, s,  x, y, px, py,
+                                                      betx, alfx, bety, alfy,
+                                                      mux, muy, dx, dy, dpx, dpy;
+}
+
 
 /*
 * Simple twiss file output with only monitors.
@@ -67,6 +77,18 @@ do_twiss_elements(use_sequence, output_file, dpp): macro = {
 };
 
 
+/*
+* Simple twiss file output with only the LHC IPs and few important columns.
+* @param sequence: name of the sequence to use.
+* @param output_file: path to the file to write, it has to be input in "" to
+* preserve upper case characters.
+* @param dpp: delta p / p to use in the twiss command.
+*/
+do_twiss_lhc_ips_few_columns(use_sequence, output_file, dpp): macro = {
+    exec, select_lhc_ips_few_columns();
+    twiss, chrom, sequence=use_sequence, deltap=dpp, file=output_file;
+};
+
 
 /*
 * Transform the coupling given in R-matrix in MAD-X to f terms.
diff --git a/model/accelerators/lhc/best_knowledge.madx b/model/accelerators/lhc/best_knowledge.madx
index 1f56dec2..d9d3aa8d 100644
--- a/model/accelerators/lhc/best_knowledge.madx
+++ b/model/accelerators/lhc/best_knowledge.madx
@@ -30,3 +30,7 @@ call, file = "%(PATH)s/extracted_mqts.str";
 
 exec, do_twiss_monitors(LHCB%(NUM_BEAM)i, "%(PATH)s/twiss_best_knowledge.dat", %(DPP)s);
 exec, do_twiss_elements(LHCB%(NUM_BEAM)i, "%(PATH)s/twiss_elements_best_knowledge.dat", %(DPP)s);
+
+! check the values at the IPs, to see that knob extraction worked.
+exec, do_twiss_lhc_ips_few_columns(LHCB%(NUM_BEAM)i, "%(PATH)s/twiss_ips_best_knowledge.dat", %(DPP)s);
+system, "cat %(PATH)s/twiss_ips_best_knowledge.dat";
diff --git a/model/accelerators/lhc/nominal.madx b/model/accelerators/lhc/nominal.madx
index 66b2dc1b..d8418ce4 100644
--- a/model/accelerators/lhc/nominal.madx
+++ b/model/accelerators/lhc/nominal.madx
@@ -31,3 +31,7 @@ if(%(USE_ACD)s == 1){
 }else if(%(USE_ADT)s == 1){
     exec, twiss_adt(%(QX)s, %(QY)s, %(QDX)s, %(QDY)s, %(NUM_BEAM)i, "%(PATH)s/twiss_adt.dat", %(DPP)s);
 }
+
+! check the values at the IPs, to see that knob extraction worked.
+exec, do_twiss_lhc_ips_few_columns(LHCB%(NUM_BEAM)i, "%(PATH)s/twiss_ips.dat", %(DPP)s);
+system, "cat %(PATH)s/twiss_ips.dat";